Baked Cheesy Beef and Shell Pasta Casserole

Instructions

1. 1

   In a skillet, cook the ground beef and onions over medium heat until the beef is no longer pink. Add the garlic and cook for 1 minute longer, then drain the excess fat.

2. 2

   Stir in the diced tomatoes, spaghetti sauce, and mushrooms. Bring the mixture to a boil, then reduce the heat and simmer uncovered for 20 minutes.

3. 3

   Meanwhile, cook the shell pasta according to the package directions until al dente, then drain.

4. 4

   In a 13x9-inch baking dish, layer half of the cooked pasta, half of the meat sauce, half of the sour cream, and half of the provolone cheese. Repeat the layers.

5. 5

   Top the casserole with the shredded mozzarella cheese. Cover and bake at 350°F for 35-40 minutes, then uncover and bake for an additional 10 minutes until the cheese is lightly browned.

6. 6

   Let the casserole stand for 10 minutes before serving.