Preheat oven to 350 degrees. Cut the ribs into individual pieces and season with garlic powder. Wrap tightly with foil and place in a baking dish. Bake 1 hour. Meanwhile, make the sauce in a sauce pan, combining soy sauce, honey, cider vinegar, garlic and black pepper over medium-low heat for about 5 min. After 1 hour of roasting, remove the ribs from the oven, unwrap the foil at one end, and drain the liquid. Be careful, as it is very hot. Pour the sauce over the ribs making sure they are well-coated. Return to the oven, and bake uncovered for another hour, basting every 10 min. The sauce will burn if left unattended, so watch it carefully the last 20 min. Place the ribs on a serving platter and top with green onions and sesame seeds.