Headed to the Food & Wine Classic (June 17 to 19) in Aspen this month? If so, your trip is likely to include a stop at Jimmy’s, An American Restaurant & Bar, a local favorite for stiff margaritas and upscale comfort food. Although the eats are mostly casual, the eatery’s wine program, led by certified sommelier Greg Van Wagner, is anything but lowbrow. In fact, it’s one of the most celebrated in town. We asked Van Wagner for a cheat sheet so you can order like a pro.