Making Spinach and Ricotta Stuffed Shells is straightforward with these easy steps:

1. Preheat Oven: Begin by preheating your oven to 375°F (190°C).
2. Cook Pasta: In a large pot, boil water. Add a generous pinch of salt and cook jumbo pasta shells according to package instructions until al dente. Drain and set aside to cool slightly.
3. Prepare Filling: In a mixing bowl, combine ricotta cheese, chopped spinach, half of the mozzarella cheese, Parmesan cheese, egg, garlic powder, Italian seasoning, salt, and pepper. Mix until well blended.
4. Fill Shells: Carefully stuff each cooked shell with the cheese and spinach mixture using a spoon or a piping bag.
5. Layer Sauce: In a baking dish, spread 1 cup of marinara sauce on the bottom, then place the filled shells seam side up in the dish.
6. Top with Sauce and Cheese: Cover the stuffed shells with remaining marinara sauce and sprinkle the rest of the mozzarella cheese on top.
7. Bake: Cover with aluminum foil and bake in the preheated oven for 25 minutes. Remove the foil and bake for an additional 10 minutes, until the cheese is bubbly and golden.
8. Garnish and Serve: Let the dish cool for a few minutes before garnishing with fresh basil. Serve warm and enjoy!

This step-by-step approach makes it easy to enjoy these delicious stuffed shells at any occasion.