In a large bowl, combine the burger ingredients. Mix gently, by hand, being careful not to overwork the mixture. Moisten hands with water and shape the meat into 4 or more burgers. Cover with plastic wrap and refrigerate for one hour.
Lightly spray patties with olive oil. Grill over medium-low heat until internal temperature reaches 165 degrees (10-12 minutes, turning once when patties release easily from grate).
Lightly toast buns over direct medium heat just before serving. Serve warm with desired toppings.
From Weber?s Big Book of Grilling (with a few minor modifications).