Prepare the Ribs : Rinse the beef ribs under cold water to remove bone fragments. Soak briefly if desired, then pat dry.

Make the Marinade : Combine soy sauce, brown sugar, mirin, grated fruit, onion, garlic, ginger, sesame oil, and pepper in a bowl.

Marinate the Beef : Place ribs in a large container, pour marinade over, and ensure all pieces are coated. Cover and refrigerate.

Cook the Galbi : Grill over medium-high heat or cook in a grill pan until ribs are caramelized and cooked through.