Preheat oven to 250 degrees. Spray deep dish with non stick cooking spray. Place ribs in pan. Combine green onions, tamari sauce,beef broth, brown sugar,ginger, garlic and pepper in a medium bowl. Mix well and pour over ribs. Cover and Bake for 5 hours or until ribs are fork tender. Add sesame oil and allow to cook another 15 minutes. Then put over rice and apply sesame seeds if desired.