Chicken Alfredo Lasagna

Name: Chicken Alfredo Lasagna
Prep time: 15 min
Cook time: 1 h 25 min
Total time: 1 h 40 min
Cuisine: American
Ingredients: 8 tablespoons butter, divided; 3 tablespoons minced garlic, divided; 1 bag spinach, chopped; 1 cup ricotta cheese; 2 tablespoons all-purpose flour; 2 cups milk; 1 cup heavy cream; 3 1/2 cup parmesan, divided; 2 cups of cooked, cubed chicken (or 3 cups of rotisserie chicken); Salt and black pepper to taste; 4 cups grated mozzarella; 9 uncooked lasagna noodles; Optional garnish suggestions: additional cheeses, such as more parmesan, parsley, and/or green onion