Add 140 grams canned tuna in oil, 120 grams kimchi, 1 tablespoon mayonnaise, 1 tablespoon toasted sesame seeds, and 1 tablespoon toasted sesame oil to a bowl. Gently mix until the ingredients are evenly distributed (it should still be chunky). Taste and add salt if needed.
To assemble, divide 3 servings rice among 3 bowls. Top each bowl with ⅓ of the tuna mixture and garnish with 1 scallion.
Finish with 3 tablespoons gim jaban and, if you like, 3 egg yolks.