Prime Rib Burgers

Name: Prime Rib Burgers
Ingredients: Kosher salt and freshly ground black pepper; 2 1/4 pounds coarsely ground prime rib; 3/4 cup Kentucky Steak Sauce, plus more for serving, recipe follows; 4 tablespoons crumbled smoked blue cheese; 2 cups baby arugula; 6 burger buns, split and toasted; Barbecue potato chips, for serving; 1 medium onion, diced; 3 cloves garlic, smashed; 2 cups ketchup; 1/2 cup bourbon; 1/2 cup Worcestershire sauce; 1/3 cup sorghum(see Cook's Note); 1/3 cup soy sauce; 1/4 cup apple cider vinegar; 3 tablespoons whole-grain mustard; Juice of 1 lemon; 1 bay leaf