Once our burgers reach charred, juicy perfection on the grill, we tend to stack them high with all kinds of toppings. More often than not, they come with a layer of melting cheese on top. But that doesn’t mean that burgers should always be built from the bottom up. Instead of laying cheese and other toppings on top as an afterthought, surprise your fellow burger eaters by stuffing your next patties at the core. If you’re grilling for a crowd, offer up burgers with a little variety.