Pulled Chicken Sandwiches

Yes. I love sandwiches. I do, I do, I do.

4 skinless, boneless chicken breast halves (about 2 lbs)
salt n pepper
1 onion, finely chopped (so so sad, my Hubby hates onions, so I don't get to use them)
4 cloves finely chopped garlic
1 1/3 cups BBQ sauce
1/2 cup apple cider vinegar
Hot pepper sauce
6 kaiser or french rolls, split
6 oz shredd monterey jack cheese

Season chicken with s&p and place in heavy pot with the onion, garlic and about 1 1/2 cups of water. Add the BBQ sauce, vinegar and a few drops of the hot sauce and bring to a boil. Reduce heat and simmer until the chicken is cooked through - about 15 minutes. Remove the chicken from the sauce and shred with two forks.
Boil the sauce, skimming occasionally, until reduced by half, about 15 minutes. Season with salt and pepper. Add shredded chicken to the sauce and heat through. Spoon mixture onto the rolls and top with cheese.