Preheat oven to 400. Grease a 9x13 pan. Dice up onion, cook in butter until pieces are clear. Add diced chicken and cook. Cut up biscuit into smaller pieces, toss with the alfredo sauce, then dump into pan. Cover biscuit mixture with bacon and chicken pieces.
Bake for 20-25 minutes, then spread 2 cups cheese on top and place back in oven until melted.