Make the marinade by first juicing the apple (or pear – the Asian pear is more traditional but they both result in a delicious dish).
Then combine it with the rest of the ingredients: minced garlic, grated ginger, sliced green onions, brown sugar, sesame oil, soy sauce, rice wine, sesame seeds, and black pepper. Mix well.
Set the short ribs in a dish so that each piece can get coated evenly. Pour the marinade over top, cover, and refrigerate.