Creating Easy Spinach and Ricotta Stuffed Shells is as simple as following these steps:

1. Cook the Pasta: Boil a large pot of salted water and cook the jumbo shells according to package instructions. Drain and set aside to cool.
2. Prepare the Filling: In a mixing bowl, combine ricotta cheese, chopped spinach, ½ cup mozzarella cheese, grated Parmesan cheese, beaten egg, garlic powder, salt, and black pepper. Mix until well combined.
3. Stuff the Shells: Preheat your oven to 375°F (190°C). Spread 1 cup of marinara sauce in the bottom of a baking dish. Gently fill each cooked shell with the spinach and ricotta mixture, then place them in the baking dish.
4. Add Sauce and Cheese: Pour the remaining marinara sauce over the stuffed shells. Sprinkle the remaining ½ cup of mozzarella cheese on top.
5. Bake: Cover with aluminum foil and bake for 20 minutes. Then, uncover and bake for an additional 10 minutes, allowing the cheese to melt and bubble.

These straightforward steps will guide you in creating a mouthwatering dish that everyone will love!