Denver's seen a boom in burger joints over the past few years, with some stripping the burger down to basics and others loading it up so that it's no longer recognizable. Highland Tap & Burger falls squarely in the middle, rethinking this iconic American dish while also celebrating what makes it remarkable. The chimi burger tops a fat medium-rare patty with white cheddar and garlicky chimichurri. The Shroomluva's comes on a bun smeared with truffle aioli, along with a pile of sautéed mushrooms and a slab of Emmentaler cheese. Our favorite, though, is the Tap burger, accessorized with a layer of root beer-marinated pulled pork in smoky, caramelly sauce, a crispy onion ring and both cheddar and American cheeses. If this is the next step in the evolution of the burger, we're there.