Creating Japanese Mochi (Sweet Rice Cakes) can be straightforward if you follow these simple steps:

1. Prepare the Filling: If using red bean paste, divide it into small balls (about 1 tablespoon each) and place them in the freezer for about 30 minutes.
2. Mix the Mochi Batter: In a microwave-safe bowl, combine the sweet rice flour, water, and granulated sugar. Stir until smooth.
3. Cook the Mixture: Cover the bowl with plastic wrap and microwave on high for 1 minute. Stir, then microwave for another minute. Repeat this process until the mixture becomes thick and sticky (about 3-4 minutes total).
4. Knead the Mochi: Dust a clean surface with cornstarch. Carefully transfer the hot mochi mixture onto the surface. Let it cool for a minute, then knead it with cornstarch-coated hands until smooth.
5. Shape the Mochi: Divide the mochi into equal portions. Flatten each piece into a circle and place a frozen filling ball in the center. Pinch the edges together to seal the filling inside.
6. Dust and Store: Roll each piece in cornstarch to prevent sticking, then place them on a plate. Allow them to cool completely before serving.

These steps will guide you in creating these incredible sweet rice cakes effortlessly.