Dice the chicken breast into small bite-sized pieces and season with sea salt and black pepper.
Heat a non-stick skillet over medium-high heat and add half of the sesame oil.
Sauté the chicken until golden brown and cooked through, then remove from the pan and set aside.
In the same pan, add the remaining sesame oil, minced garlic, and the whites of the scallions, stirring until fragrant.
Add the chopped kimchi and gochujang, cooking for 2 minutes to caramelize the flavors.
Stir in the cooked brown rice and tamari, tossing well to ensure every grain is coated and heated through.
Return the chicken to the pan and mix to combine.
In a separate small skillet, fry the egg until the whites are set but the yolk remains runny.
Plate the rice mixture, top with the fried egg, and garnish with the green parts of the scallions.