Set oven control to broil. In 8-inch skillet, cook ground turkey over medium heat, stirring frequently, until no longer pink; drain. Stir in pasta sauce. Cook, stirring occasionally, until thoroughly heated.
Meanwhile, place slices of bread on ungreased cookie sheet. Broil 4 to 6 inches from heat 30 to 60 seconds or until lightly toasted.
Turn bread slices over; top each with 1 teaspoon Parmesan cheese. Broil 1 to 1 1/2 minutes or until top is golden brown.
Remove from broiler. Spoon turkey mixture evenly onto bread. Top each with mozzarella cheese. Return to broiler; broil 30 to 60 seconds longer or until cheese is melted.