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Test Kitchen Approved

4-Ingredient Casserole

VegetarianCasseroleDiner-Style

Time: 50 minutes

Yield: 6 servings

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About

Yep, that's right. 4-Ingredient Casserole really only has four ingredients. Well, honestly, it can have up to 5 ingredients if you're craving a little garden freshness from a layer of spinach. Otherwise, it's just bright tomato sauce, cheesy and tender ravioli, and melty mozzarella with a topping of sharp and nutty parmesan. 4-Ingredient Casserole impresses with its own simplicity, and it is sure to please the crowd! It's amazing what only 4 (or 5) ingredients can do!

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Ingredients

  • 2 1/2 cups marinara sauce
  • 1 (24-ounce) package frozen cheese ravioli
  • 1 (8-ounce) package frozen spinach, optional, thawed and squeezed-dry
  • 2 cups mozzarella cheese, shredded
  • 1/4 cup parmesan cheese, grated

Directions

Step 1 -Preheat the oven to 400 degrees F.

Step 2 -Spray a 9x13-inch baking dish with cooking spray.

Step 3 -Pour a thin layer, about 1/2 cup, of the marinara sauce to cover the bottom of the prepared baking dish.

Step 4 -Arrange 1/2 of the frozen ravioli in a single layer over the sauce.

Step 5 -Layer the spinach on the ravioli, if using.

Step 6 -Add 1/2 of the marinara and 1/2 of the mozzarella in even layers in the baking dish.

Step 7 -Repeat the layers of the ravioli, the sauce, and the mozzarella once, starting with the ravioli.

Step 8 -Sprinkle the parmesan cheese on top.

Step 9 -Cover the baking dish with aluminum foil and bake for 20 minutes.

Step 10 -Remove the foil and bake, uncovered, until bubbly and hot in the center, about 20-25 minutes.

Step 11 -Let stand for 10 minutes.

Step 12 -Serve.

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