- Fire up the grill. Form the meat into a patty and season liberally with salt and pepper. Sear the burger on each side over hottest part of grill then move it to indirect heat. After about 2 minutes on each side, or when patty is medium rare, spread about an 1½ ounces pimento cheese on top and put it in broiler.
- While burger is finishing in broiler, brush bun with a little melted butter and toast on indirect heat. By the time the cheese is melted, the patty should be a perfect medium.
- To assemble, spread 1 tablespoon mustard on the bottom half of bun. Add lettuce, onion, and tomato, and top with burger, bacon, and top of bun.
For Pimento Cheese:
Combine cheeses, mayonnaise, onion, shallot, and peppers, then fold in all the remaining ingredients. Recipe yields one quart.