Sprinkle duck evenly with salt and pepper. Place on grill rack coated with cooking spray. Cook 4 minutes on each side or until desired degree of doneness; let stand 4 minutes. While duck grills, prepare Champagne-Honey Vinaigrette.
Slice duck breast thinly across the grain. Divide salad mix evenly on each of 4 plates. Top each serving with duck, cherries, blue cheese, and almonds. Drizzle Champagne-Honey Vinaigrette evenly over each serving.