1. Wash the potatoes, peel them, and cut into thick slices
2. Cover with plastic wrap and put in the microwave on high heat for about 5 minutes
3. Add corn oil, salt, milk and black pepper while it is hot, grind and mix well
4. Put it in a cut piping bag
5. Squeeze the pattern on a baking pan covered with greased paper
6. Put it into the middle and upper layer of the preheated oven, and bake at 180 degrees for about 15 minutes, and the surface can be colored.
7. Take it out and let cool
