Full Menu Delivery Available at this location on the Taco John’s app and Doordash. At Taco John’s®, they serve traditional Mexican food—with a twist. By fusing bold American flavors with south-of-the-border spice, they’ve defined their signature menu. From their trademark Potato Olés® and freshly prepared tacos to their breakfast burritos and made-in-house tortilla chips, you’ll always find something to crush your craving. Go see why their customers become life-long fans. Visit Taco John’s Watertown today.