Tuna Burger with Pineapple-Mustard Glaze and Green Chile–Pickle Relish
This burger was a staple on Mesa Grill’s lunchtime menu for years and it still makes a guest appearance from time to time. Tuna is a perfect choice for an alternative burger as its substantial meatiness really emulates that of beef. It also stands up to aggressive seasonings and is the perfect base for the slightly sweet, slightly tangy, slightly spicy pineapple-mustard glaze. The relish isn’t like anything you’ll get at a hot-dog stand; dill pickles, peppery poblano chiles, and tart lime juice make for a fresh, not sweet, crunchy relish.