Mamta
Heat olive oil in a pan. Sauté garlic, mushrooms, and spinach until tender. Season with salt and pepper.
Spread marinara sauce on the bottom of a baking dish. Add a layer of lasagna sheets. Top with ricotta, spinach-mushroom mix, and mozzarella.
Repeat until all ingredients are used. Finish with mozzarella and Parmesan on top.
Preheat oven to 375°F (190°C).
Cover the dish with foil and bake for 25 minutes. Remove foil and bake for an additional 10 minutes until cheese is golden.
Set the lasagna cool for 5 minutes. Slice, serve, and enjoy!