Making Spinach and Ricotta Stuffed Manicotti is both fun and fulfilling. Follow these step-by-step instructions to achieve delightful results:

1. Preheat Oven: Preheat your oven to 375°F (190°C).

1. Cook Manicotti: Bring a large pot of salted water to a boil. Cook the manicotti shells for 6-8 minutes until al dente, making sure they're still firm. Drain and rinse under cold water to stop further cooking.

1. Prepare Filling: In a mixing bowl, combine ricotta cheese, chopped spinach, half of the mozzarella cheese, half of the Parmesan cheese, garlic powder, onion powder, and black pepper. Mix well until all ingredients are thoroughly combined.

1. Stuff Manicotti: Carefully fill each manicotti shell with the spinach and ricotta mixture. You can use a piping bag or a spoon for easier filling.

1. Arrange in Baking Dish: Spread a thin layer of marinara sauce on the bottom of a 9×13 inch baking dish. Place the stuffed manicotti in a single layer on top of the sauce.

1. Top with Sauce: Pour the remaining marinara sauce over the stuffed manicotti, ensuring they are well covered. Sprinkle the remaining mozzarella and Parmesan cheese on top.

1. Cover the Dish: Cover the baking dish with aluminum foil to retain moisture during baking.

1. Bake: Place the dish in the preheated oven and bake for about 25-30 minutes. If you prefer a crispy topping, remove the foil during the last 10 minutes of baking.

1. Cool: Remove from the oven and allow it to cool for 10-15 minutes.

1. Garnish and Serve: Finish with fresh basil leaves for garnish before serving.

These detailed steps will lead you to create an aromatic and delicious Spinach and Ricotta Stuffed Manicotti that everyone will love!