Tuna Onigiri are simple rice balls with a special place in Japanese cuisine ... You can also swap out white rice for brown rice for a unique twist. If you enjoy seasoned rice, add a splash ...

Slice the tuna and soak in the sake and soy sauce mixture ... Stir in the shiro-an (white kidney bean paste), add a pinch of salt. 2. Empty into a bowl, put it in an ice bath.