Combine cherries, onion, sage, salt, and thyme; mix well. Cut a pocket on the thicker side of the chicken breast; sprinkle lightly with salt if desired. Stuff 1/4 of cherry mixture into the pocket; close opening with metal skewers or wooden picks. Combine oil, vinegar, garlic salt, and pepper; mix well. Marinate stuffed chicken breasts 1/2 hour in refrigerator. Broil or grill chicken breasts, brushing with marinade, until fully cooked and juices run clear when sliced.
Oven Method: Brown stuffed chicken in oven-safe skillet on both sides. Bake at 375° F 12 to 15 minutes or until juices run clear.
Per Serving: 305 Calories, 32.4 g protein, 11.5 g carbohydrate, 14.3 g fat (42% Cal. from fat), 86 mg cholesterol, 1.1 g fiber, 1,130 mg sodium.