Preheat the oven to 375°F (190°C).
Cook lasagna noodles according to package instructions.
In a large skillet, heat olive oil over medium heat and sauté minced garlic until fragrant.
Add the ground chicken to the skillet, season with salt and pepper, and cook until browned.
Stir in sliced mushrooms and cook until they have released their moisture.
Add chopped spinach and Italian seasoning; cook until the spinach is wilted.
In a separate bowl, mix ricotta cheese with salt, pepper, and half of the Parmesan cheese.
Spread a layer of marinara sauce on the bottom of a baking dish.
Layer noodles, chicken mixture, ricotta mixture, and marinara sauce; repeat until all ingredients are used.
Top the final layer with remaining mozzarella and Parmesan cheese.
Cover with foil and bake for 25 minutes, then remove the foil and bake for an additional 15-20 minutes.
Allow the lasagna to rest for 10-15 minutes before serving.