Ingredients 1 lb ground beef (make 4 patties) 1 onion, thinly sliced 8 slices bread (rye or sandwich bread) 8 slices provolone or Swiss cheese 2 tbsp butter 1 tsp Worcestershire sauce Salt, pepper Instructions Form 4 beef patties, season with salt + pepper, cook until done. In skillet, sauté onions with Worcestershire until caramelized….