Pre-heat the oven to 400. Line a baking sheet with parchment paper and set aside. Use a pastry brush to brush the outsides of both sides of the chicken breasts with the olive oil and place them on the prepared baking sheet. Sprinkle lightly with salt and pepper and place in the oven. Bake for 15 minutes. Remove from the oven and flip each breast over. Split the barbecue sauce equally into two small dishes. Using the pastry brush again (wash it in between!), paint the chicken breasts using half of one dish of the barbecue sauce. Flip the breasts back over and paint the top side with the remaining barbecue sauce from that dish. Place back in the oven for another 5 minutes. Wash the brush thoroughly again before step three.

Remove the baking sheet from the oven and lift the parchment paper holding the breasts off of the sheet and set aside. Re-line the sheet with aluminum foil or more parchment and transfer the chicken breasts back onto the freshly lined pan. Discard the parchment paper holding any remaining oil/liquid. You may want to check now to make sure the chicken is cooked through (or almost). Use the remaining dish of barbecue sauce to slather the tops of each chicken breast one last time. Sprinkle the cheese over top of each breast and follow with the bacon pieces. Place back into the oven and bake for another 3-5 minutes until cheese is melted.