Dice the pork loin into small, bite-sized cubes to mimic the texture of traditional pork belly.
Heat a non-stick skillet over medium-high heat and sear the pork cubes until golden brown and cooked through.
Add the chopped kimchi, garlic powder, and ginger powder to the skillet, sautéing for 3 minutes until the kimchi is fragrant and slightly caramelized.
Fold in the cooked brown rice, tamari, and gochujang, stirring constantly until the rice is well-coated and steaming.
Push the rice mixture to one side of the pan, add the sesame oil to the empty space, and crack the egg into it.
Fry the egg until the whites are set and crispy at the edges but the yolk remains runny.
Transfer the kimchi fried rice to a bowl, top with the fried egg, and garnish with sliced green onions and toasted sesame seeds.