Spread 1 tablespoon strawberry spread on one side of each of 6 bread slices. Place 1 ounce of turkey and 1 slice of cheese over strawberry spread on each bread slice; top with remaining 6 bread slices.
Combine eggs, egg white, and milk; stir well with a wire whisk. Carefully dip sandwiches into egg mixture, allowing excess to drip off. Sprinkle both sides of each sandwich evenly with cornmeal.
Coat a large nonstick skillet with cooking spray; place over medium-low heat until hot. Place 3 sandwiches in skillet; cook sandwiches 6 to 8 minutes on each side or until bread is golden and cheese melts. Remove from skillet, and sprinkle sandwiches evenly with half of powdered sugar. Repeat procedure with remaining 3 sandwiches and remaining powdered sugar. Serve immediately.