Add the already ground beef into a food processor with all the seasoning and ground until all ingredients has been incorporated. Gently form the meat into 4 balls, and then lightly press into 4-inch-wide, 1-inch-thick patties. Make a 2-inch-wide indentation in the center of each with your thumb to prevent the burgers from bulging when grilled. Preheat a grill to high. Grill, undisturbed, until marked on the bottom, 3 to 5 minutes. Turn and grill until the other side is marked and the patties feel firm, 3 to 5 more minutes. Serve the patties on the buns with your desired topping.