In a bowl, whisk together all of the marinade ingredients until smooth. Reserve 1/2 of the marinade and pour the other portion onto the pork chops into a shallow bowl or dish. Cover the pork chops with saran wrap and marinate for several hours.
When you are ready to grill the pork chops, heat the grill to medium-high heat. Remove the pork chops from the marinade and add them to the hot grill. Let the pork chops cook on both sides until nice grill lines appear and the center of the pork chops are a light pink. Remove pork chops from the grill and let rest. With the reserved marinade, pour into a small sauce pan and bring the marinade to a boil. Once the marinade begins to thicken, remove from the heat (if it gets too thick, add a little more orange juice to the sauce to loosen it up).
Pour the thickened marinade over the cooked pork chops. Garnish with some sesame seeds, and sliced green onions. You can also garnish with slices of oranges if you wish too.