cut chicken breasts into small chunks, and season with olive oil, salt, pepper, and garlic

cook chicken on the griddle until it reaches an internal temp of 165 degrees

while the chicken is cooking cook red onions

once both are cooked combine with about 1/2 cup of BBQ sauce

cover chicken in provolone cheese and let melt (be careful not to let sit too long or chicken/bbq sauce will start to burn)

spread butter on sub rolls and toast them for just a couple of minutes

build sandwiches