Start by pre-heating your panini press to 400 degrees, or heating a large skillet on medium-high heat.
Top one slice of Ciabatta bread with thinly sliced, grilled chicken. Pour desired amount of barbecue sauce over the chicken. Top with cooked bacon and cheddar cheese. Top with second slice of bread. Spray with butter spray on both sides of bread.
Place onto your panini grill and grill until cheese has melted. I cooked mine for about 3 minutes. If using a skillet, cook on each side for about 2-3 minutes, pressing sandwich down with a spatula. Cook until cheese has melted.
Carefully remove Panini from grill. Add lettuce, tomato, and red onion. Enjoy!