Salt quail eggs.

Cut potatoes and fry in oil till good brown. Put some salt.

Cut dried seaweed

Wrap the small cup with film then place the dried seaweed inside. Put cooked rice.

Wrap film on rice and pressure with spoon. Then make hole with rolling pin.

Make cup like this.

Put fried potatoes and quail eggs.

I bought this rice cup maker at ¥100 Daiso shop. This is so useful.