Purple sweet potato dumplings

Overview

I like purple potatoes not because of how nutritious they are, but just because of the intoxicating purple color.

Prepare glutinous rice flour and a steamed purple potato.
Add water and peeled purple sweet potato to the glutinous rice flour and knead until it becomes a complete dough.
Roll the kneaded dough into small balls as soon as possible to prevent it from drying out.
Bring water to a boil in a pot, add small dumplings, wait until they float to the surface and put them into a bowl.