1 lb. ground beef
1⁄2 c. red onion, minced
1⁄4 c. fresh parsley, minced
2 tsp. Worcestershire sauce
1⁄4 tsp. sea salt
1⁄4 tsp. ground black pepper
3 hamburger buns, lightly toasted
3 slices bacon (optional)
Prepare grill for medium-high heat.
Combine the ground beef, onion, parsley, Worcestershire sauce, salt and pepper and mix well.
Divide the meat mixture into 6 balls. Press each ball into a 4-inch patty.
Stack the cheese slices and cut into thirds. Arrange cheese over 3 of the patties.
Place the remaining patties over the cheese and press edges together tightly.
Flatten the burgers to 1⁄2 -inch thickness.
Grill the burgers to medium doneness, about 4 minutes per side.
Place the burgers on toasted buns, top with bacon and serve with your favorite condiments.