Mix the glutinous rice flour, sugar, and water until smooth.

Cover loosely and microwave for 1 minute.

Stir well, then microwave again for 30 seconds.

Repeat until the dough becomes thick, glossy, and elastic.

Let cool slightly.

Dust a surface with starch, turn out the dough, and divide into portions.

Flatten each piece, add filling, and pinch closed.

Shape gently and dust off excess starch.