Add ground beef, salt, pepper, Worcestershire sauce, breadcrumbs, and egg to a bowl. Stir to combine or mix by hand.
Refrigerate for 10 minutes for the flavors to blend.
Divide the beef mixture into four equal parts. Form into 4 patties that are about ¾-inch thick and 4 ½ inches across.
Using your knuckle, make a small indentation in the center of each patty. This will help them to cook evenly and prevents the middle from rising during the cooking process.
MAKE SAUCE:
Make the sauce by combining all of the ingredients in a small bowl. Set aside.
COOK BURGERS:
Heat a skillet or grill pan over medium heat for 3 minutes. Add vegetable oil to the pan.
Add the patties and cook until browned on both sides, about 5 minutes on each side.
During the last minute of cooking, add a slice of cheddar cheese on top of the burger.
TO FINISH:
Assemble the burger. I assembled mine by adding the spicy mayonnaise sauce on top of the bun followed by the red onion, beef patty, chese, tomato, lettuce, and another layer of the mayonnaise sauce followed byt he top bun.
Serve and enjoy.
Notes
SERVE: You can keep the hamburgers out for about two hours before they need to be covered and refrigerated.STORE: It’s best to store the cooked hamburger patties and spicy mayonnaise sauce separately. The patties will keep for about 4-5 days in an airtight container in the refrigerator and the spicy mayonnaise sauce for about 2 weeks in an airtight container in the refrigerator. FREEZE: The only component I recommend freezing is the burger itself. Cooked beef patties will last in the freezer for 2-3 months. Raw patties will last for longer, about 6 months. Keep each patty separated with parchment paper or wrapped individually in plastic wrap and in an airtight container. DEFROST: Defrost the hamburger patties overnight in the refrigerator. MAKE AHEAD: You can mix the beef with salt, pepper, Worcestershire sauce, and breadcrumbs 2 days prior, keep in the fridge, sealed.