1/2 c. soy sauce (Kikkoman)
1/4 c. orange juice
1/2 c. red wine vinegar
1 1/2 tbsp. sugar
1/2 tsp. garlic powder

Mix marinade ingredients. Pour over skinless chicken breasts (other pieces, if preferred), and marinate for at least 3 hours or more. Best when prepared on barbecue grill, turning frequently. do not over cook.