Combine soy sauce, vinegar, oil, honey, ginger and garlic in a blender. Pour into a sealable plastic bag. Add beef and marinate at room temperature 30 minutes or in refrigerator overnight.
Drain beef, reserving marinade. Skewer beef alternately with pineapple and apple cubes. Brush kabobs with marinade and grill 15 to 20 minutes, depending on desired doneness. Baste often with marinade. Serve with steamed rice. Serves 6.