Barbecued Chicken - cooking recipe

Ingredients

4 skinless-boneless chicken breast halves (4oz. ea.)
FOR THE SAUCE:
1/4 c. ketchup
3 Tbsp. cider vinegar
1 Tbsp. ready-made white horseradish
2 tsp. firmly packed dark brown sugar
1 clove garlic (minced)
1/8 tsp. dried thyme
1/4 tsp. black pepper

Preparation

Preheat broiler, heat a charcoal grill until coals form white ash, or preheat gas grill to medium.