What started as a weekly popup at Box Elder now can be found at the Citadel food hall. A shameless play on the United States Postal Service, United States Burger Service is the king of killer burgers in Miami. These burgers have garnered a cultlike following in a relatively short time period. Everything from the potato bun to the cheese sauce is made from scratch by husband-and-wife team Michael Mayta and Keily Vasquez. The pun-filled menu often features over-the-top specialty creations that rotate weekly, but the "Ground" (a single patty with "government cheese" and "priority" sauce for $7.50) and "2-day" (a double patty option for $10) is where it's at. The smashed patty has just the right amount of crisp while remaining juicy. The star of the show is the house-made cheddar-fontina sauce labeled "government cheese" — it's decadent, flavorful, and nothing like what government-assisted funding would provide. Add some "Insurance, " AKA thick-cut fries ($3.50) to complete the experience.