Cut chicken breasts into thin strips. Add butter to skillet and melt over medium to high heat. Add onion and garlic and cook 1 minute to get the flavors flowing into the butter. Add chicken, hoisin sauce and cook until chicken is white on the outside but still pink on the inside (approximately 5 minutes). Add the chinese five spice, black pepper and soy sauce and cook another 5 minutes on medium to high heat, reduce temperature and simmer covered 5-10 minutes so the chicken becomes tender.
Fold into lettuce wraps!
This is very filling, low carb and low calorie. Enjoy!