Bring a large pot of lightly salted water to a boil. Add lasagna noodles and cook for 8 to 10 minutes or until al dente; drain. (Optional if using oven ready noodles)
In a skillet over medium-high heat, cook mushrooms, onions, and garlic in olive oil for 4 to 5 minutes. Drain excess liquid and cool.
Wilt spinach for 2 minutes, either in pan or in microwave . Drain, then squeeze out excess liquid.
Combine ricotta cheese, Romano cheese, oregano, basil, pepper, in a bowl.
Spread a thin layer of sauce across the bottom of a greased or pan sprayed 9 x 13 baking dish.
Lay 4 to 5 lasagna noodles in bottom of a 9x13 inch baking dish.
Spread one third of the cheese mixture over noodles, then ⅓ of the spinach and ⅓ of the mushrooms.
Sprinkle ½ cup mozzarella cheese on top.
Spread ⅔ to 1 cup pasta sauce over cheese.
Repeat layering 2 times, then top with sauce and an additional ½ cup of mozzarella.
Cover dish with aluminum foil and bake in a preheated oven for 45 minutes
Cool 15 minutes before serving
Recipe by JAQUO Lifestyle Magazine at https://jaquo.com/spinach-and-mushroom-lasagna-in-tomato-sauce/