Creamy Spinach and Mushroom Lasagna – TartAmour

Ingredients

• 12 lasagna noodles
• 2 tablespoons olive oil
• 1 medium onion, diced
• 3 cloves garlic, minced
• 8 ounces fresh mushrooms, sliced
• 16 ounces fresh spinach, washed and chopped
• 1 teaspoon dried thyme
• Salt and pepper to taste
• 15 ounces ricotta cheese
• 1/2 cup grated Parmesan cheese
• 1 egg
• 2 cups shredded mozzarella cheese
• 4 tablespoons butter
• 4 tablespoons all-purpose flour
• 3 cups milk
• 1/4 teaspoon nutmeg