Grill chicken breasts until almost done (about 155 degrees).
Preheat oven to 350 degrees.
Top each grilled chicken breasts with a schmear of bbq sauce, two slices of crispy bacon and a handful of shredded cheese. Place in oven for 10 minutes or until cheese is melted and bubbly and chicken registers 165 degrees.
Remove from oven and sprinkle with diced tomato, jalapeno and scallion. Allow to rest for 5 minutes before serving.