Cheesy Tortellini Casserole

Cheesy Tortellini Casserole is like lasagna, minus all the time and effort. Just boil some tortellini, mix with tomato sauce, top with cheese, and bake until bubbly. Dinner is ready!

Cheesy Tortellini Casserole
Elise Bauer

A Quick Casserole When You Crave Lasagna

Do you ever get a craving for lasagna, and start thinking of the different ingredients you'll need, but stop when you remember that it will take close to two hours to make and you want something sooner rather than later?

This cheesy tortellini casserole is for those moments. It's a bit like a baked lasagna—with pasta, cheese, tomato sauce—but a lot easier to put together.

The Secret Is Frozen Cheese Tortellini

Of course, the reason it's so easy to assemble is that you are starting with already made cheese-filled tortellini, which can usually be found in the frozen food section of your grocery store (if not, frozen ravioli would also work).

You can also use boxed tortellini or even fresh tortellini; cook it according to the package instructions until just al dente before assembling the casserole.

Cheesy Tortellini Casserole on spoon
Elise Bauer

A Simple, Adaptable Casserole

As you boil the water for the tortellini, you make the sauce. Then toss the cooked tortellini with the sauce, put in a casserole dish, cover with Mozzarella and bake until bubbly. That's it!

In this version we are including chopped cremini mushrooms because they taste great, and chopped chard for a healthy green. You could use spinach instead of the chard, or skip it all together.

Or you could use sausage instead of the mushrooms for a meat-based approach. This hearty vegetarian casserole is perfect for a Meatless Monday meal.

How to Store and Reheat

This casserole will keep in the fridge for about five days. Reheat individual portions in the microwave, or reheat the whole casserole in a warm oven until warmed through.

More Cheesy Pasta Casseroles:

Cheesy Tortellini Casserole

Prep Time 10 mins
Cook Time 50 mins
Total Time 60 mins
Servings 4 to 6 servings


  • 1 1/2 pounds (24 ounces) prepared frozen cheese tortellini

  • Salt

  • 12 ounces cremini or white button mushrooms, roughly chopped or sliced into 1/4-inch slices

  • 1 tablespoon butter

  • 3 cloves garlic, minced (about 1 tablespoon)

  • 1 (28-ounce) can crushed tomatoes

  • 1 large bunch Swiss chard, ribs removed, leaves chopped (about 2 cups), or 2 cups fresh chopped spinach, or 1/2 cup frozen spinach

  • 1 1/2 teaspoons dried basil or 1 tablespoon finely chopped fresh basil

  • 1/4 teaspoon fennel seeds, crushed

  • Pinch red pepper flakes

  • 1/2 cup grated Parmesan cheese

  • 4 to 6 ounces mozzarella cheese slices, enough to cover the surface of the casserole


  1. Pre-heat oven to 400°F
  2. Boil the tortellini:

    Heat a large pot with 3 quarts of water and 1 1/2 tablespoons of salt on high heat. When the water starts to boil, add the tortellini. Once the water returns to a boil, cook for an additional 2 minutes, until al dente.

    You want the pasta cooked al dente because it will continue to cook when baked in the casserole. Remove from heat and drain. Set aside.

    cheese tortellini being boiled in water
    Elise Bauer
  3. Sauté the mushrooms:

    While you are preparing the pasta, start on the sauce. Heat a large thick bottomed stick-free (hard anodized aluminum or cast iron are best) pan on medium heat.

    Add the mushrooms. "Dry" sauté them for 5 to 10 minutes with no added fat. As the mushrooms heat they will release water and cook in their own juices.

    Once the mushrooms are well coated with the water that they are releasing, stir in a tablespoon of butter.

    mushrooms in skillet on stove
    Elise Bauer
    mushrooms with butter being melted in the center of skillet
    Elise Bauer
  4. Finish the sauce:

    Add the garlic, crushed fennel seeds, and red pepper flakes to the mushrooms and cook a minute more.

    Add the crushed tomatoes and the dried or fresh basil. Increase the heat to bring to a simmer, then lower the heat to maintain a low simmer for 5 minutes.

    Add the chopped chard and cook for 5 more minutes until the chard begins to wilt.

    Stir in the grated Parmesan cheese. Add 1/2 teaspoon of salt (more or less to taste).

    tomato sauce for cheese tortellini
    Elise Bauer
    sauce with chard being cooked in skillet for tortellini casserole
    Elise Bauer
  5. Assemble the casserole:

    Stir the cooked tortellini into the sauce and remove from heat. Spread the tortellini mixture into a 9x13 casserole dish in an even layer. Arrange a layer of sliced Mozzarella cheese over the top of the tortellini.

    cheese tortellini in baking dish
    Elise Bauer
    sliced cheese on top of cheese tortellini in baking dish
    Elise Bauer
  6. Bake:

    Cover with foil. (Either cover the casserole in a way that the foil is not touching the cheese or spread a little olive oil over the inside of the foil so that the casserole cheese does not stick to the foil while it cooks. You can also use stick-free foil.)

    Bake at 400°F for 20 minutes. Remove foil and broil for 4 to 5 minutes more until top is lightly browned and bubbly.

    baked tortellini casserole with melted cheese in baking dish
    Elise Bauer
Nutrition Facts (per serving)
558 Calories
19g Fat
71g Carbs
29g Protein
Show Full Nutrition Label Hide Full Nutrition Label
Nutrition Facts
Servings: 4 to 6
Amount per serving
Calories 558
% Daily Value*
Total Fat 19g 25%
Saturated Fat 10g 52%
Cholesterol 82mg 27%
Sodium 1253mg 54%
Total Carbohydrate 71g 26%
Dietary Fiber 7g 26%
Total Sugars 9g
Protein 29g
Vitamin C 25mg 127%
Calcium 479mg 37%
Iron 6mg 34%
Potassium 1063mg 23%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Nutrition information is calculated using an ingredient database and should be considered an estimate. In cases where multiple ingredient alternatives are given, the first listed is calculated for nutrition. Garnishes and optional ingredients are not included.