Follow these simple steps to create your very own Spinach Lasagna with Ricotta:

1. Preheat your oven to 375°F (190°C) and grease a 9×13-inch baking dish with olive oil.
2. Cook the lasagna noodles according to package instructions until al dente. Drain and lay flat on a clean kitchen towel.
3. In a large mixing bowl, combine ricotta cheese, chopped spinach, egg, garlic powder, Italian seasoning, salt, and pepper. Mix well until fully incorporated.
4. Spread a thin layer of marinara sauce evenly over the bottom of the prepared baking dish.
5. Place three lasagna noodles on top of the marinara sauce, slightly overlapping as needed.
6. Spoon half of the ricotta mixture over the noodles, spreading it evenly.
7. Pour one-third of the remaining marinara sauce over the ricotta mixture. Sprinkle with one-third of the mozzarella cheese.
8. Repeat the layering process: noodles, ricotta mixture, marinara sauce, and mozzarella. Finish with a final layer of noodles, the remaining marinara sauce, and top with mozzarella and Parmesan cheese.
9. Cover the baking dish with aluminum foil and bake in the preheated oven for 30 minutes.
10. Remove the foil and bake for an additional 15-20 minutes, or until the cheese is bubbly and golden brown.
11. Once cooked, remove from the oven and let it cool for 10-15 minutes before slicing.

These steps will guide you in creating this incredible Spinach Lasagna with Ricotta effortlessly.