Preheat oven at 350°F.
Combine ground chicken, breadcrumbs, egg, garlic powder, red pepper flakes, and Hidden Valley® Ranch Seasoning packet mix with hands until well combined. Roll into 1 inch balls and put on non-stick cookie sheet or lightly greased cookie sheet, bake for 35 minutes until done.
Meanwhile in a large bowl combine cole slaw mix, Chipotle dressing, and BBQ sauce and toss until well combined. Set aside in refrigerator until serving time.
Remove meatballs from oven. Set aside to slightly cool. Brush rolls with butter, each side, and toast 2 minutes or until lightly golden brown. Remove cole slaw from refrigerator and toss again.
Add two meatballs to the bottom sub roll and top meatball with cole slaw, add fried onions (desired amount) and top with top roll. Enjoy and serve still warm.