Italian Shells Casserole - cooking recipe

Ingredients

1 lb pasta shells, medium size
1/2 teaspoon salt
1 cup sour cream
8 ounces provolone cheese, shredded
1 lb ground beef
2 cups marinara sauce
1/4 teaspoon pepper
8 ounces mozzarella cheese, shredded

Preparation

Cook shells and drain (while waiting, go on to next steps).
Brown ground beef and drain. Add salt, pepper, and marinara sauce. Simmer 20 minutes.
In deep pan, line bottom with 1/2 of the shells. Cover with half of the meat sauce. Spread half of the sour cream lightly over and then sprinkle with half of both the cheeses. Repeat.
Cover and bake at 350\u00b0F for 40 minutes.
Uncover and bake 20 minutes more.