Mix sweet rice flour, water and sugar in a microwave-safe glass or ceramic bowl.
Cooking
Cook the mixture in the
microwave for 3 minutes and 30 seconds. Stir the mixture and heat for another 15 to 30 seconds.
Shaping
Dust work surface with cornstarch. Roll balls the size of about 2 tablespoons.
Filling
Flatten the mochi ball and place filling paste in the center. Pinch the mochi over the red bean paste until the paste is completely covered.
Repeat until all the mochi and red bean paste is used.