Preheat your oven to 375°F (190°C).
Cook the lasagna noodles according to package instructions; drain and set aside.
In a skillet, heat olive oil over medium heat and sauté fresh spinach until wilted.
In a bowl, combine ricotta cheese, half of the mozzarella, garlic powder, salt, and pepper.
Spread a layer of béchamel sauce on the bottom of a baking dish.
Layer three lasagna noodles over the sauce.
Spread half of the ricotta mixture over the noodles.
Add half of the sautéed spinach on top of the ricotta.
Repeat the layering process, finishing with noodles and béchamel sauce.
Top with remaining mozzarella and Parmesan cheese.
Bake for 45 minutes until golden and bubbly.
Let it cool for a few minutes before serving, garnished with fresh herbs.