Cook the rice and let it cool slightly.

In a pan, heat sesame oil and sauté ground beef until fully cooked.

Add grated carrot and chopped spinach to the pan and cook until softened.

Season the mixture with soy sauce, salt, and sesame seeds. Stir well.

Combine the cooked rice with the beef and vegetable mixture.

Shape the mixture into small rice balls using your hands or a mold.