Add Barbecue sauce or Barbecue sauce & bourbon to a large skillet or griddle. Heat until hot and just beginning to caramelize on the edges. Stir and add the leftover pot roast and turn gently to coat. Continue to heat for a minute or two, watching heat level carefully, so the sauce caramelizes a bit. Take off heat, divide meat mixture into four piles, top with cheese and add a lid so the cheese melts.
Place pickles on the bottom bun, scoop up a pile of the beef & cheese and add to bun. Top with the onion rings, the top bun and serve.
Keywords: Barbecue Sauce, Bargain Meal of the Week, Beef, bourbon, Cheese, leftover beef, onion rings, onions, Pot Roast, Sandwiches