Tear the dry gelatin sticks into several pieces and soak in a bowl of cold water to cover for 15 minutes.
Meanwhile, cut the oranges in half through the stems. Carefully scoop out the insides. (You can start with a grapefruit knife or spoon, but the job is best done with fingers, peeling and tugging gently.) Do your scooping over a bowl to catch any juice. You should have completely smo