Step 1

Gently mix ground beef with the other ingredients: Put ground beef, mustard, garlic, onions, blue cheese, water, egg, and a sprinkling of salt and pepper into a large bowl. Use your hands to gently mix the ingredients together until just incorporated. Do not over-mix.

Step 2

Shape into patties and chill: Shape into patties, about 1/2 inch thick and larger than your bun. Refrigerate at least 30 minutes or until you are ready to cook.

Step 3

charcoal or gas grill for cooking over high direct heat. Using tongs and a folded up paper towel dipped in vegetable oil, oil the grill grates. Make sure grill is hot and well oiled before laying down the patties.

Step 4

Season and grill the burgers: Season patties with salt and pepper. Place the patties on the clean, well-oiled grill grate. Grill the burgers for about 5 minutes per side. Do not press down on the burgers while cooking. If you don't have a grill, you can use a grill pan or a cast iron frying pan for the burgers.Serve on hamburger buns with lettuce and mayonnaise.