There is a credo that Jack Martinez, proprietor of Jack-N-Grill, lives by: “Comida sin chile, no es comida,” meaning “A meal without chile is not a meal.” This means few options are lacking this key ingredient, roasted on the premises every September during harvest season and stocked in a freezer to last the year. Served in a dining room decorated with jacks of all kinds—from Nicholson to the jack of hearts—hearty Mexican options like burritos and rellenos are complemented by less expected items such as stuffed sopapillas and posole stew. The burgers are also some of the biggest and best in Denver, and competitive eaters may want to try the 7-pound breakfast burrito ($22).