Create the Panade: In a large bowl, combine the white bread and milk. Mash them together until they form a smooth paste.
Add Flavorings: To the bread paste, add the salt, pepper, minced garlic, Worcestershire sauce, and ketchup. Mix well to ensure the seasonings are evenly distributed.
Combine: Add the ground beef and finely chopped scallions to the bowl. Fold the meat into the mixture gently—do not overwork the beef, or the burgers will become tough.
Form & Grill: Shape the mixture into 10 even patties. Grill over medium-high heat until they reach your desired level of doneness.
Serve: Place on buns and add your favorite toppings.