1.

Peel the purple potatoes and steam them, mash them, and add the right amount of sugar

2.

Add cornstarch and a little bit of water, I kneaded it by hand.

3.

Add a little bit of flour, it's good to add a little bit of flour, it's sticky, so that you can make it into a playdough like that.

4.

Knead into long strips, →_→ kinda like poop. I'm not sure if it's a good idea, but I'm sure it's a good idea.

5.

Then you can cut it with a knife, or you can knead it with your hands.

6.

After the water boils, you throw the taro balls in and cook them until they change color and boil again, then you can fish them out.

7.

You can take it to freeze and eat it the next day to yogurt.