Do up a big patty on a flat top grill, or large pan (or open flame grill it and transfer to flat pan for this next part), and do shredded cheese instead of sliced. Drop a big handful of shredded cheese on it, letting the cheese spill over onto the pan. Wait for the cheese draped over the side to get crispy on the pan, then fold it on top of the patty and serve. Cheese skirt. The best.