Defrost the frozen vegetables naturally or by boiling. Cut the edamame beans in half as they're big (the skin will peel off easily).
Mayo version: Mix half of the edamame and corn with mayonaise and a little salt. Add half of the rice and mix well. Shape into onigiri rice balls. If you squirt too much mayonnaise, the rice won't stick together.
Salt version: Mix the rest of the edamame beans, corn, rice and a little salt and shape into onigiri rice balls.
You can make two kinds of onigiri.
For grilled onigiri: Lightly brush the onigiri with soy sauce, and grill in a oven for about 5 minutes. It'll crisp and smell wonderful.
I used a sweet soy sauce form Kagoshima prefecture. Add a pinch of sugar to soy sauce and brush it on the onigiri.
Story Behind this Recipe
I had frozen veggies that was nearing its expiration date, so I mixed them together and made this.
I just defrosted frozen edamame beans and corn, so you don't need to use heat.