Dice the chicken breast into bite-sized pieces and season with sea salt and black pepper.
In a small bowl, whisk together the gochujang, soy sauce, minced garlic, and grated ginger.
Heat half of the sesame oil in a non-stick skillet over medium-high heat and cook the chicken until browned and cooked through, then toss with the gochujang sauce to glaze.
Remove the chicken from the pan and set aside; add the remaining sesame oil, chopped kimchi, and cooked brown rice to the same skillet.
Stir-fry the rice and kimchi for 3-4 minutes until the rice is slightly crispy and fragrant.
In a separate small non-stick pan, fry the egg until the whites are set but the yolk is still runny.
Plate the kimchi fried rice, top with the glazed chicken and the fried egg, and garnish with sliced green onions.