My Family's Favorite Spinach Mushroom Lasagna: - 55Recipes

Ingredients

• 2 tablespoons olive oil
• 1 medium onion, diced
• 3 cloves garlic, minced
• 8 oz mushrooms, sliced
• 4 cups fresh spinach, roughly chopped
• 15 oz ricotta cheese
• 1 cup freshly grated Parmesan cheese
• 1 large egg
• Salt and pepper to taste
• 9-12 lasagna noodles
• 2 cups shredded mozzarella cheese
• 2 cups marinara sauce
• Fresh basil leaves (optional)