Easy meals like this super simple slow cooker pineapple barbecue chicken are always in style. Pineapple chunks, sweet onion and barbecue seasoned chicken breasts are smothered with barbecue sauce and slow cooked until the flavors combine and the chicken is tender and succulent. Serve over rice to take advantage of the scrumptious cooking liquid or alongside a loaded baked potato and a salad to round out the meal.