"Manju" Traditional Steamed Cake (Japan)

I love any kind of steamed cakes, especially humbows. Here's a tasty Japanese recipe.
I studied Japanese all through high school and college. I also study Karate. I speak pretty good Japanese, but I still haven't had the chance to visit Japan.

• 1 cup all purpose flour
• 2 tsps baking soda
• 1/2 cup sugar
• 1/4 cup water
• 1/2 cup anko (sweet azuki beans)

PREPARATION:

Mix flour and sugar in a bowl. Put baking soda in the water. Add the water in the bowl. Knead the dough for 10-15 minutes. Divide the dough into 12 pieces. Make round shapes and flatten them. Put anko (sweet beans) filling on the center. Wrap the anko by stretching the dough and make manjyu. Steam the manjyu on high heat for 15 minutes.