Best-Ever Grilled Burger

Ingredients

1 egg, lightly beaten

1/2 cup water

1/4 cup finely chopped onion, leek, shallot, or green onions

1/4 cup grated Parmesan, Romano, or Asiago cheese (1 ounce)

2 tablespoons snipped fresh basil or parsley or 1 teaspoon dried basil or parsley, crushed

2 tablespoons Worcestershire sauce or steak sauce

1 1/2 teaspoons instant beef bouillon granules

1 teaspoon garlic powder

1/2 teaspoon black pepper

1 pound ground beef*

1 pound ground pork*

8 onion buns, hamburger buns, or kaiser rolls, split and toasted

1 recipe Mustard Sauce

Lettuce leaves (optional)

Thin tomato slices (optional)

Thin red onion slices (optional)

Dill pickle spears (optional)

In a large bowl combine egg, the water, onion, cheese, basil, Worcestershire sauce, bouillon granules, garlic powder, and pepper. Add beef and pork; mix well. Shape meat mixture into eight 3/4-inch-thick patties.
For a charcoal grill, grill patties on the rack of an uncovered grill directly over medium coals for 14 to 18 minutes or until done (160 degrees F), turning once halfway through grilling. (For a gas grill, preheat grill. Reduce heat to medium. Place patties on grill rack over heat. Cover; grill as directed.)
Serve burgers on buns with Mustard Sauce. If desired, top with lettuce, tomato slices, and onion slices, and serve with pickle spears.