Super Easy Ravioli Lasagna

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• 375 grams Italian sausage (mild or spicy; about ¾ pound)
  Ingredient note

  Source: 375 grams Italian sausage (mild or spicy; about ¾ pound)
• 1 each medium onion (finely diced)
  Ingredient note

  Source: 1 medium onion (finely diced)
• 4 cups marinara or tomato pasta sauce
  Ingredient note

  Source: 4 cups marinara or tomato pasta sauce
• 2 cloves minced garlic
  Ingredient note

  Source: 2 cloves minced garlic
• 1 teaspoon Italian seasoning
  Ingredient note

  Source: 1 teaspoon Italian seasoning
• 500 grams frozen cheese ravioli (about 1 pound)
  Ingredient note

  Source: 500 grams frozen cheese ravioli (about 1 pound)
• 4 cups shredded mozzarella cheese
  Ingredient note

  Source: 4 cups shredded mozzarella cheese
• 2 tablespoons shredded Parmesan cheese
  Ingredient note

  Source: 2 tablespoons shredded Parmesan cheese

1. Preheat oven to 375 degrees F and lightly grease a 9×13" baking dish.
2. In a large skillet, cook Italian sausage and onion over medium heat until sausage is browned.
3. Stir in tomato sauce, garlic and Italian seasoning and simmer for a couple of minutes until onions are tender.
4. Spread ⅓ of the sauce into the bottom of a baking dish and top with half of the frozen ravioli. Top with 2 cups shredded mozzarella and another ⅓ of the sauce.
5. Top with the remaining ravioli, the last ⅓ of the sauce and remaining 2 cups cheese. Sprinkle with Parmesan.
6. Lightly grease a piece of tin foil and cover tightly. Bake for 30 minutes, or until ravioli are tender, then uncover and broil or brown the cheese as desired.