Wash and cut potatoes in half. Place in steam bag. Add oil and seasoned salt. Close bag tightly with nylon tie. Toss mixture to coat potatoes. Poke 4 small holes in bag below nylon tie. Microwave on high 12 to 13 minutes. Butter may cause a popping noise to occur, this is normal. Let potatoes stand in bag for 5 minutes. Open bag and serve.