Beef-Stuffed Shells with Creamy Ricotta Filling Ingredients: 12 jumbo pasta shells 1 lb ground beef 1 cup ricotta cheese 1 cup marinara sauce 1 cup mozzarella cheese, shredded 1/2 cup Parmesan cheese, grated 1 egg 1 tsp Italian seasoning Salt and pepper, to taste Directions: Preheat the oven to 375°F (190°C). Cook the pasta shells according to the package instructions. Drain and let them cool slightly. In a skillet over medium heat, brown the ground beef. Once fully cooked, drain any excess fat