Zucchini Lasagna with Ground Turkey

Name: Zucchini Lasagna with Ground Turkey
Ingredients: Non-stick cooking spray; 5-6 medium (3 pounds) zucchini or yellow squash; 3/4 teaspoon coarse kosher salt , divided; 3/4 teaspoon freshly ground black pepper , divided; 1 cup low-fat ricotta, optional; 1 teaspoon pure olive oil; 1 medium onion, chopped; 4 garlic cloves , very finely chopped; 1 pound ground turkey, preferably breast meat; 1 ( 14.5 ounce ) can crushed tomatoes; 1 tablespoon chopped fresh basil; 1 tablespoon fresh parsley, chopped, optional; 1/4 teaspoon red pepper flakes, or to taste; 1/3 cup shredded Parmesan cheese, divided; 1 cup ( 4 ounces ) shredded part- skim mozzarella cheese