Lightly oil the grill and preheat the BBQ to medium.
In a bowl, whisk the egg, then add mustard, Worcestershire sauce, white onion, garlic, salt and pepper. Mix well.
Crumble in the beef and gently mix with your hands or a fork, if desired. Handle the meat as little as possible to keep it tender.
Shape the mixture into patties that are ¾-inch thick. Use your thumb to make a shallow dent in the center of each patty. This will help stop them from puffing up while cooking.
Put the burgers on the grill, close the lid, and cook for 6-8 minutes per side, turning once, until they are no longer pink inside. An instant-read thermometer should register 160°F for a fully cooked yet juicy burger.
Avoid pressing the burgers with a spatula, pricking with a fork, or turning frequently to retain juices.
Serve the burgers in warm, crusty buns. Add your favorite toppings like ketchup, garlic aioli, cheese, red onion, tomato, bacon, lettuce, or pickles.
Notes
The nutrition information is just for the meat patty.Don’t have a grill? Make it on the stovetop or in the oven!No problem! You can get the same crispy char on a cast-iron skillet. Just heat 1 tablespoon of neutral oil and cook for 3-5 minutes on each side depending on how done you like your burger.I prefer the grill or stovetop so you can get a nice sear on the hamburger patty. But, you can certainly cook these in the oven if you like. Preheat your oven to 425°F and place the patties on a baking sheet. Cook for about 15 minutes or until they’re cooked through.