In a large bowl, combine ground beef, grated onion, and Worcestershire sauce. Gently mix until just combined and set aside.

Shape the mixture into four patties, each about ¾-inch thick, making a ½-inch deep indent in the center.

Refrigerate the patties for at least 20 minutes to firm up.

Preheat your grill to medium heat and season the patties with salt and black pepper.

Cook the patties for about 4-6 minutes on each side, flipping only once, until the internal temperature reaches 160°F.

Remove the patties from heat and let them rest for 5 minutes before serving.