Spaghetti Squash Chicken Lasagna

Name: Spaghetti Squash Chicken Lasagna
Ingredients: 1 medium spaghetti squash (about 4 pounds); Nonstick cooking spray; 1 tablespoon olive oil; 1 medium onion, diced; 4 garlic cloves, minced; 1 bunch kale, de-stemmed and roughly chopped into bite-size pieces (3 cups); 2 cups cooked chicken, such as from a rotisserie chicken; Salt and freshly ground black pepper; 15 ounces part-skim ricotta; 1 egg; 2 cups shredded mozzarella cheese; 2 1/2 cups marinara sauce; Chopped fresh basil, for topping (optional)