Vegetarian Lasagna

Name: Vegetarian Lasagna
Prep time: 30 min
Cook time: 1 h
Total time: 1 h 30 min
Yield: 8
Ingredients: Ingredients; 12 lasagna noodles; 2 tablespoons olive oil; 1 large onion, diced; 4 cloves garlic, minced; 1 large zucchini, diced; 1 red bell pepper, diced; 8 oz mushrooms, sliced; 5 cups fresh spinach, chopped; 32 oz ricotta cheese; 1 large egg; 1/2 cup fresh basil, chopped; 1/4 cup fresh parsley, chopped; 1 teaspoon salt; 1/2 teaspoon black pepper; 3 cups marinara sauce; 3 cups mozzarella cheese, shredded; 1 cup Parmesan cheese, grated