【Ingredients】：

3 potatoes

4 pieces of butter

Rosemary a little

【Step】:

1. Put chopsticks under the potatoes and cut them into thin slices. Don't cut them.

2. Put it in the oven at 180℃ / 355℉ and bake it for 35 minutes. 

3. Add butter and sprinkle with black pepper. Then bake for another 5-10 minutes。You can also put some rosemary.