A delicious way to prepare spaghetti squash, the addition of chicken breasts with pesto, ricotta, marinara and mozzarella transforms the humble vegetable into an excellent Italian hot dish the entire family will enjoy. Microwave cooking speeds up the cook time on the squash, then all the ingredients get together in layers and bake up golden brown, bubbly and delicious. Get the recipe for Pesto Chicken Spaghetti Squash Bake.