Smoky BBQ Burger with Caramelized Onion Topping

Method

1. Preheat grill or skillet to medium-high heat.
2. In a pan, cook onions with brown sugar until caramelized, about 10 minutes. Set aside.
3. Form ground beef into 4 patties. Cook over medium-high heat until desired doneness, 3-4 minutes per side.
4. Brush barbecue sauce on both sides of the patties and cook for 2 more minutes.
5. Place pepper jack cheese on each patty and let melt.
6. Toast potato buns. Assemble with mayonnaise, vinegar, onions, and patty.
7. Serve immediately.
8. Check that the ground meat reaches 71°C (160°F) throughout before serving.