1. Cut chicken livers in half, roll in half of a bacon slice, and thread meat alternately with onions, green peppers, mushroom caps and tomatoes on skewers.
2. Place on broiler rack, brush with favorite barbecue sauce or butter mixture. Broil about 6-inches from heat for 5 minutes. Turn, brush with sauce and broil for approximately 5 minutes longer, or until bacon is crisp and liver is slightly pink inside.