Heat a large nonstick skillet or saucepan coated with cooking spray over medium-high heat. Add turkey and onion; sauté 3 minutes or until onion is tender. Stir in water, soup, and cheese; reduce heat to low and cook 4 minutes or until cheese melts, stirring until mixture is smooth. Stir in pasta and next 3 ingredients; cook until thoroughly heated. Garnish with parsley sprigs, if desired.