Cook 2 cups of short-grain rice according to the package instructions, ensuring it reaches a sticky yet fluffy consistency (15–20 minutes). Let it sit until slightly warm.

While the rice is warm, transfer it to a large mixing bowl and add 1 tablespoon of sesame oil and ½ teaspoon of salt. Mix gently until evenly distributed.

Prepare your chosen filling by mixing or chopping ingredients to ensure they are well-integrated.

Fold in your chosen filling, adding roasted seaweed flakes, sesame seeds, and soy sauce. Mix until evenly combined.

Wet your hands and take ¼ cup of the rice mixture to form a ball. Repeat until all rice is used.

Enjoy your rice balls immediately or wrap them in plastic wrap for later storage.