Total Time30 min
In a well sized bowl mix ground beef, egg, diced onion, bread crumbs, Worcestershire sauce, minced garlic, 1 teaspoon salt, and 0.5 teaspoon pepper until well blended.
Divide mixture into four equal portions and shape each into a patty about 10cm wide.
Lay burgers on a slightly oiled preheated frying pan/grilling pan. To check that your pan is ready, place your hand just above the pan. If you can hold your hand at grill level only for 2 to 3 seconds, it is ready to start.
Cook the burgers for 3-5 minutes on each side, until browned on both sides and no longer pink inside (cut to test), 7 to 8 minutes total. Remove from grill.
Lay the buns cut side down on grill and cook until lightly toasted, 30 seconds to 1 minute.
Spread the half of mayonnaise and ketchup on bun bottoms. Then add lettuce, tomato, burger, onion, and salt and pepper on top of each other. Set bun tops in place and you are all set.