Making Easy Spinach and Ricotta Stuffed Shells can be straightforward if you follow these instructions:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Cook Pasta Shells: Boil water in a large pot, then add the pasta shells and cook until al dente. Drain and cool under cold water to stop cooking.
3. Mix Filling: In a large bowl, combine ricotta cheese, chopped spinach, half of the mozzarella cheese, Parmesan cheese, egg, garlic powder, Italian seasoning, salt, and pepper. Mix well until combined.
4. Stuff the Shells: Take each cooled pasta shell and fill it generously with the cheese and spinach mixture. Place the filled shells seam side up in a baking dish.
5. Prepare Sauce: Spread a layer of marinara sauce on the bottom of the baking dish, then pour additional sauce over the stuffed shells.
6. Add Cheese: Sprinkle the remaining mozzarella on top of the sauce to create a cheesy crust.
7. Bake: Cover the dish with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 10-15 minutes until the cheese is bubbly and golden.
8. Cool and Serve: Once out of the oven, let the dish cool for about 10 minutes. Garnish with fresh basil before serving.

These steps will help you create an incredible dish that is both satisfying and delicious.