If not using leftover chicken – cook chicken by preferably grilling. Dice cooked chicken into small chunks and set aside.
Butter the bottom of a flour tortilla. Place buttered side down in a nonstick skillet.
Sprinkle tortilla evenly with cheese. On one side of the tortilla evenly sprinkle chicken, bacon, tomatoes, and onion.
Drizzle with barbeque sauce.
Fold one side of the tortilla over the top and press down with a spatula. Remove from pan and repeat with the second.