Then how about a simple onigiri?

Er... milled rice?

I'm sorry to burst your bubble there, sir...

Hiriji's 3-second cooking technique

Put required amount of rice in your palm.

Apply as much force as a pressure cooker and voilà!

I recommend practicing with a frying pan first until you familiarize yourself with the recipe.

Small Memo

If too much force is applied, carbon will turn into diamonds. Pay attention to how much force you apply!

Aaah, so that's why it feels so gritty in my mouth.