1. Rock sugar spare.
2. Sweet potato starch water is set aside.
3. Wash the apples.
4. peel.
5. Cut thin slices.
6. Cut the hawthorn cake into small pieces.
7. Put hawthorn cake and appropriate amount of water in the pot.
8. Turn the high heat to a low heat and cook for about five minutes.
9. Put in the apple again.
10. Cook for about five minutes, pour in the blended sweet potato starch water, stir slowly with a spoon, and cook for about three minutes.
11. Add rock sugar and cook for a while.
12. Put it into a bowl.
13. Dessert.
