The beauty of onigiri is, just like sandwiches, you can get creative with the filling. Consider using diced cooked sweet potatoes and carrots, Japanese sweet rolled omelette (tamagoyaki), salted ...
For the batter, mix flour, potato starch, baking powder and water ... Microwave the yaki-onigiri according to the directions on the package. 2. Dissolve granulated dashi in hot water.