How to Make It
Make the marinade: Bring soy sauce, sugar, and corn syrup just to a boil over high heat in a saucepan, stirring to dissolve sugar. Remove from heat; cool.
Place soy sauce mixture and remaining marinade ingredients in a blender. Process until smooth.
Make the ribs: Slash ribs to the bone in a crosshatch pattern on meaty side of ribs at 1-inch intervals. Turn ribs over and make one slash crosswise along the entire rack of ribs through the connective tissue all the way to the bone. Cut between bones into individual ribs. Place ribs, half of scallions, and marinade in a large baking dish. Cover and refrigerate.