Peel and wash the onion, then remove excess water.

Slice the onion into round pieces and separate the layers.

Mix cooked rice, chopped carrot, chopped onion, egg, sesame salt, and a pinch of salt in a bowl.

Coat the onion rings with flour lightly and shake off excess.

Heat a pan with grape seed oil and place the floured onion rings on it.

Fill the onion rings with the rice mixture and cook until the onion turns translucent and golden brown on both sides.