Blend blueberries with water to make juice.

In a bowl, combine glutinous rice flour, salt, and honey.

Add the blueberry juice to the mixture and stir with a spoon.

Form a crumbly dough using the mixture.

Cover a microwave-safe container with plastic wrap and microwave for 3 minutes.

Flip the dough using a spatula, cover again with plastic wrap, and microwave for another 2 minutes.

Knead the cooked dough in a plastic bag or wrap with a bit of oil applied.

Spread soybean powder on a tray and shape the dough into a long form, coating it evenly with the powder.