Tamagoyaki Bento Box

Rinse rice with cool water until the water runs clear; drain. Bring rice and ¾ cup water to a boil in a pot; reduce heat. Simmer until water is absorbed, about 15 minutes. Cool 10 to 20 minutes.

Cut nori sheet into two 1-inch strips; reserve remainder of sheet for tamagoyaki.

Form cooled rice into 4 equal portions using wet hands, keeping hands wet to keep rice from sticking. Create an indention in 1 rice portion using your thumb; fill indention with 1 teaspoon bonito flakes. Top with another rice portion to enclose onigiri. Form into an oval shape; wrap middle with 1 nori (1-inch) strip. Repeat to make a second onigiri with remaining rice portions, bonito flakes, and nori (1-inch) strip. Sprinkle white and black sesame seeds on top of onigiri. Place in a bento box.