Grilled Chedder & Pancetta Hamburger

The best burgers have some fat in the meat. The fat is where much of the flavor comes from. However, if you prefer to a leaner meat this recipe will still work and add plenty of flavor.
1 1/3 pounds of fresh ground round
1/3 cup of Bourbon Barrel Aged Worcestershire Sauce
4 ounces of cheddar (any cheese will do. Adjust quantity to your tastes
and the flavors of different cheeses.)
One Vidalia onion—caramelized
4 crusty rolls—sliced and toasted
Crisp Kentucky Bibb lettuce
Four slices of Pancetta—cooked

It’s important to keep your meat chilled while mixing. (Please refer to recipe card)
Thoroughly Mix the Worcestershire and cheddar into the meat with your
hands.
Slice the onion and caramelize in heavy sauté pan over medium heat. This
should take about 15-20 minutes. Try not to stir onions too often.
Place hamburgers on grill and cook to desired temperature.