Switch up your usual burger toppings with this French bistro-style cheeseburger recipe. Grilled onions and a tasty Dijon-style mustard sauce top this tasty cheeseburger.
Lightly shape Ground Beef into four 3/4-inch thick patties. Coat onion with cooking spray. Place patties on grid over medium, ash-covered coals; arrange onion around patties. Grill, covered, 8 to 10 minutes (over medium heat on preheated gas grill, covered, 7 to 9 minutes) until instant-read thermometer inserted horizontally into center registers 160°F, turning occasionally. Season with salt and pepper after turning. About 1 minute before patties are done, top each with 2 cheese slices.
Combine mayonnaise and mustard; spread on top halves of rolls. Serve burgers and onion in rolls with lettuce and tomato, as desired.
Test Kitchen Tips Cooking times are for fresh or thoroughly thawed Ground Beef. Color is not a reliable indicator of Ground Beef doneness.