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Updated: Jul 17, 2025 · Published: Oct 15, 2024 by Nikki · This post may contain affiliate links · 4 Comments

RIGATONI AL FORNO (VEGETARIAN)

↓ Jump to Recipe

Rigatoni al Forno (vegetarian) is a baked pasta dish that comes together in 20 minutes. It is covered in a thick, creamy tomato and lentil sauce. It's topped with gooey cheese. It does not use a lot of ingredients which makes it budget-friendly and perfect for a crowd or just a midweek family dinner.

Rigatoni al forno with a piece of basil on the top.

🇮🇹 Hello tender rigatoni, rich tomato sauce, creamy cheese, and a perfectly golden crust.

Jump to:
  • 🍝 WHAT IS RIGATONI AL FORNO?
  • WHAT IS RIGATONI?
  • ❤️ WHY YOU'LL LOVE THIS RECIPE
  • 🥄 INGREDIENTS NEEDED AND SUBSTITUTIONS
  • 👩🏼‍🍳 STEP-BY-STEP INSTRUCTIONS
  • WHAT TO SERVE RIGATONI WITH?
  • 📝 TIPS AND TRICKS
  • ❓ FAQS
  • MAKE-AHEAD, STORAGE AND REHEATING

I have my fair share of pasta recipes on this blog. From Ricotta Pesto Pasta, Goat Cheese Pasta, One-Pot Mushroom Pasta, Pasta Pesto, or Creamy Veggie Pasta but I think this rigatoni al forno recipe is one of my favorite!

🍝 WHAT IS RIGATONI AL FORNO?

Rigatoni al Forno is a classic Italian baked pasta dish. Rigatoni pasta is coated in a rich tomato or meat sauce, layered with gooey cheese then baked to a bubbly, golden perfection. Sometimes, it's made with hearty ground beef or sausage, or even veggies like zucchini. Similar to my oven-baked risotto or mac and cheese, these dishes are cooked in the oven, and are perfect for cozy dinners or family gatherings!

The side view of a scoop of pasta al forno.

WHAT IS RIGATONI?

Rigatoni is a type of tube-shaped pasta that is larger and ridged, making it ideal for holding onto sauces.

A close up shot of rigatoni pasta.

❤️ WHY YOU'LL LOVE THIS RECIPE

Absolutely delicious, tomatoey + creamy

So much flavor and texture (the lentils add a nice bite)

Easy and quick to make

No huge cleanup (everything is made in two pots)

Perfect for lunch or dinner

Leftovers taste even better the next day!

Rigatoni al forno in a large baking dish with a small portion of pasta in a bowl next to it.

🥄 INGREDIENTS NEEDED AND SUBSTITUTIONS

RIGATONI PASTA:

I love using rigatoni pasta for baked dishes. The edges hold the sauce and the hollow pieces fill up when it's baked. You can use any pasta that you prefer but I would recommend using penne or rotini.

OLIVE OIL:

When it comes to pasta and olive oil, I always use the best quality.

ONIONS, GARLIC, AND CELERY:

This is going to be the base of the pasta. It gives so much flavor, slowly fried together.

HERBS

Mixed herbs work. Or you can use your favorite Italian herbs.

PASSATA:

A jar of passata- the smoothed, pureed tomato sauce.

LENTILS:

Use a can of lentils (rinsed and drained), it makes life a lot easier. If you have the time, then boil your lentils from scratch. If you don't love lentils, then use your favorite beans like black beans, cannellini, or even chickpeas.

A can of lentils.
Brown Lentils
A bottle of tomato passata.
Tomato Passata

BROWN SUGAR:

This takes away any acidic flavor from the tomatoes.

HEAVY CREAM:

This brings the dish together. If you don't love cream then leave it out.

GRATED CHEESE:

I use half-grated mozzarella and half-grated sharp cheddar. You can use grated parmesan or ricotta too if you like.

Ingredient list for rigatoni al forno.

👩🏼‍🍳 STEP-BY-STEP INSTRUCTIONS

Cook the Pasta:
Bring a large pot of salted water to a boil. Add the rigatoni and cook 5 minutes less than the package instructions to ensure the pasta is al dente. You want the pasta to be slightly undercooked, as it will continue to cook in the oven. Reserve ½ cup of the pasta water, then drain the pasta and set it aside.

Sauté the Veggies:
In a large skillet, heat the olive oil over medium heat. Add the diced onion and celery, and sauté until golden, about 5 minutes. Be careful not to burn the onions. Add the minced garlic and Italian seasoning and a good pinch of salt and pepper, and cook for an additional minute until fragrant.

Step 1: Cook the pasta and reserve some pasta water.
Boil the pasta.
Step two: Fry the onions, celery and garlic.
Fry the celery, onions and garlic.

Prepare the Sauce:
Pour the passata into the skillet, then add ½ cup of water by swirling it in the empty passata jar to catch any remaining sauce, and pour it into the skillet. Stir in the brown sugar, and heat the mixture until everything is warmed through.

Add Lentils and Cream:
Stir in the rinsed and drained brown lentils, followed by the heavy cream. Let the sauce heat up for another 5 minutes, stirring occasionally, until it becomes rich and creamy.

Step 3: Add the passata.
Add the passata.
Step four: Add the lentils.
Add the lentils.

Combine Pasta and Sauce:
Add the cooked rigatoni to the sauce and gently toss to coat. If the sauce seems too thick, gradually add some of the reserved pasta water to loosen it up.

Cheesy Bake:
Preheat your oven to 375°F (190°C). Transfer the pasta and sauce mixture to a baking dish. Sprinkle the shredded cheese (half mozzarella and half sharp cheddar) evenly over the top.

Step five: Add the cream.
Add the cream
Step six: Add the grated cheese.
Add the pasta and grated cheese.

Bake:
Bake in a preheated oven at 375°F (190°C) for about 20-25 minutes, or until the cheese is bubbly and golden brown. If you like a little extra crisp on top, switch to broil for the last couple of minutes – just keep an eye on it! Buon appetite!

If you loved this recipe, please leave a 5-star rating and review below. Thanks!

Rigatoni al forno with a piece of basil on the top.

WHAT TO SERVE RIGATONI WITH?

stuffed garlic bread on a platter with fresh basil.
STUFFED GARLIC BREAD
A salad with a tablespoon of mustard on the side.
CHICKPEA SALAD
Pizza on sour dough bread.
PIZZA TOAST

📝 TIPS AND TRICKS

Save That Starch Water!
Before you drain your pasta, scoop out about ½ cup of the starchy pasta water. This helps thicken your sauce and binds everything together for a creamier texture.

Don’t Overcook the Pasta
Cook your rigatoni to just al dente (firm to the bite) or 5 minutes below the recommended cooking time on the packaging. The pasta will continue to cook in the oven as it bakes, so if you overcook it in the pot, it might turn mushy in the final dish. No one wants soggy pasta!

Canned Lentils for Convenience
Using canned lentils is a huge time-saver, and they work perfectly in this dish. Just be sure to rinse and drain them before adding to the sauce. If you prefer using dried lentils, allow them to soak for a few hours beforehand. You’ll also need to simmer them in the tomato sauce until they’re tender.

Add Sugar: This balances any acidity from the tomatoes.

Let It Rest: Allow the pasta to rest for a few minutes after taking it out of the oven. This cooling time helps the sauce thicken and allows the flavors to meld together perfectly.

A serving spoon scooping out the cooked pasta.

❓ FAQS

WHAT DOES AL FORNO MEAN?

It's an Italian phrase that means "baked" or "from the oven." It's used to describe dishes that are cooked in the oven. So, when you see "al forno" on a menu, it’s a sign that the dish has been baked to perfection!

IS LASAGNE THE SAME AS RIGATONI AL FORNO?

No, lasagne and rigatoni al forno are not the same. Lasagne uses flat pasta sheets layered with sauce and cheese, while rigatoni al forno uses tube-shaped rigatoni mixed with sauce and cheese before baking. Both are baked pasta dishes but have different textures and preparations.

WHAT SIZE BAKING DISH SHOULD I USE?

I used a 23 cm (5.3 L) casserole dish for this recipe. Other suitable options include a 9x13-inch (3.5-quart) dish or any oven-safe baking dish around 5 to 5.5 liters in capacity.

The side view of a scoop of pasta al forno.

MAKE-AHEAD, STORAGE AND REHEATING

MAKE-AHEAD


You can assemble the entire dish a day in advance. Cover it tightly with foil and store it in the fridge. When ready to bake, bring it to room temperature for about 30 minutes, then bake as directed.

STORAGE

Store leftovers in an airtight container in the fridge for up to 3-4 days

FREEZING

Let the rigatoni cool completely, then transfer to an airtight, freezer-safe container. Freeze for up to 3 months.

REHEATING

For best results, reheat in the oven at 350°F (175°C) for about 20 minutes until warmed through. Add a splash of water and cover with foil to prevent drying out. You can also microwave individual portions, but the oven keeps the texture better

A baking dish with rigatoni al forno.


Did you make this recipe? Let me know what you think by leaving a ★★★★★ star rating & comment below. It genuinely helps me & I really appreciate your support! Nikki 💚

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Rigatoni al forno with a piece of basil on the top.

RIGATONI AL FORNO (VEGETARIAN)


5 Stars 4 Stars 3 Stars 2 Stars 1 Star

5 from 2 reviews

  • Author: Nikki
  • Total Time: 5 min Prep Time + 15 min Cook Time = 20 Min Total Time
  • Yield: serves 4-6 1x
  • Diet: Vegetarian
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Description

Rigatoni al Forno (vegetarian) is a baked pasta dish that comes together in 20 minutes. It is covered in a thick, creamy tomato and lentil sauce. It's topped with gooey cheese. It doesn't use a lot of ingredients which makes it budget-friendly and perfect for a crowd or just a midweek family dinner.


Ingredients

Scale

12 ounces ragitoni pasta (340 g)

½ cup pasta water, reserved

2 tablespoons olive oil

1 onion diced

1 celery stalk diced

6 garlic cloves minced

1 tablespoon Italian seasoning

1 jar of passata, pureed tomatoes (680 g / 24 oz)

½ cup water (pour the water into the empty passata jar, give it a swirl, and pour it back into the sauce)

1 teaspoon brown sugar

14-ounce can of brown lentils, rinsed and drained (140 g)

1 cup heavy cream

1 cup shredded cheese, I use half mozzarella and half sharp cheddar.


Instructions

Cook the Pasta:
Bring a large pot of salted water to a boil. Add the rigatoni and cook 5 minutes less than the package instructions to ensure the pasta is al dente. You want the pasta to be slightly undercooked as it will continue to cook in the oven. Reserve ½ cup of the pasta water, then drain the pasta and set it aside.

Sauté the Veggies:
In a large skillet, heat the olive oil over medium heat. Add the diced onion and celery. Add a large pinch of salt and pepper and sauté until golden, about 5 minutes. Be careful not to burn the onions. Add the minced garlic and Italian seasoning, and cook for an additional minute until fragrant.

Prepare the Sauce:
Pour the passata into the skillet, then add ½ cup of water by swirling it in the empty passata jar to catch any remaining sauce, and pour it into the skillet. Stir in the brown sugar, and heat the mixture until everything is warmed through.

Add Lentils and Cream:
Stir in the rinsed and drained brown lentils, followed by the heavy cream. Let the sauce heat up for another 5 minutes, stirring occasionally, until it becomes rich and creamy.

Combine Pasta and Sauce:
Add the cooked rigatoni to the sauce and gently toss to coat. If the sauce seems too thick, gradually add some of the reserved pasta water to loosen it up.

Cheesy Bake:
Preheat your oven to 375°F (190°C). Transfer the pasta and sauce mixture to a baking dish. Sprinkle the shredded cheese (half mozzarella and half sharp cheddar) evenly over the top.

Bake:
Bake in a preheated oven at 375°F (190°C) for about 15 -20 minutes, or until the cheese is bubbly and golden brown. If you like a little extra crisp on top, switch to broil for the last couple of minutes – just keep an eye on it! Buon appetito!

If you loved this recipe, please leave a 5-star rating and review below. Thanks!

 

Notes

Let It Rest: Allow the pasta to rest for a few minutes after taking it out of the oven. This cooling time helps the sauce thicken and allows the flavors to meld together perfectly.

Baking Dish Size: I used a 23 cm (5.3 L) casserole dish for this recipe. Other suitable options include a 9x13-inch (3.5-quart) dish or any oven-safe baking dish around 5 to 5.5 liters in capacity.

Add Sugar: This balances any acidity from the tomatoes.

Don’t Overcook the Pasta
Cook your rigatoni to just al dente (firm to the bite) or 10 minutes below the recommended cooking time on the packaging. The pasta will continue to cook in the oven as it bakes, so if you overcook it in the pot, it might turn mushy in the final dish. No one wants soggy pasta!

Save That Starch Water!
Before you drain your pasta, scoop out about ½ cup of the starchy pasta water. This helps thicken your sauce and binds everything together for a creamier texture. 

  • Category: Family Dinner, Pasta
  • Method: Stove Top and Oven
  • Cuisine: Italian

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Reader Interactions

Comments

  1. Nikki says

    October 15, 2024 at 7:25 am

    Let me know if you have any questions! Nikki

    Reply
  2. Jack says

    December 30, 2024 at 11:37 am

    I'll definitely make this again. It was delicious.

    Reply
    • Nikki says

      December 30, 2024 at 9:55 pm

      Thanks for the comment! I'm thrilled that you loved it! Nikki

      Reply

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