1 In large bowl, combine turkey, soup mix, ketchup (or tomato juice), prepared mustard (or dry mustard) and pepper. 2 Shape into 8 patties approximately 4 inches in diameter. 3 Grill or broil about 4-inches from heat, in a preheated grill or broiler, cook turkey burgers about 5 minutes per side, turning only once. Cook until no longer pink in center and the internal temperature registers 165 degrees F4 To serve, place burgers on buns.