Got the recipe from http://momofukufor2.com/2010/01/yaki-onigiri-recipe/
Ingredients
cooked Japanese rice (i dont have stock of this, I used bario rice)
water
soy sauce
oil
Directions
1. Shaped hot rice into desired onigiri shapes.
2. Grill in a lightly oiled medium-low pan until all sides form a crispy crust.
3. Brush all sides with soy sauce and re-fry all sides.