Buried in a nondescript Arvada strip mall, Las Potrancas has much to recommend it: solid green chile, good chips and salsa, killer huevos rancheros, tequila bottle service (and tequila lockers, in case you'd like to store your purchase). But the best reason to venture to this cantina is the rellenos nachos, an inspired variation on the bar classic that dials up the indulgence factor considerably. For this snack, the kitchen replaces chips with a pile of chopped chiles rellenos — as in deep-fried chiles stuffed with Jack cheese. Add spicy green chile, more cheese and a little pico de gallo, and you get a platter that looks like a competitive eating challenge and eats like a guilty pleasure (and, oh, what a pleasure). Add chicken, steak or chicharrones to make these nachos a meal.