In a large skillet or wok over medium-high heat, add the pork belly and cook until the fat renders and the edges are golden and crispy.
Add the ground pork to the skillet, breaking it apart with a spatula, and cook until browned and fully cooked through.
Stir in the garlic, ginger, and the white parts of the green onions, sautéing for one minute until fragrant.
Add the chopped kimchi and gochujang, stirring to combine and heating until the kimchi begins to soften.
Fold in the cold jasmine rice and tamari, pressing the rice into the pan to ensure it makes contact with the heat for a crispy texture.
Create a small well in the center of the rice, crack the egg into it, and scramble quickly before folding it into the rest of the mixture.
Drizzle with toasted sesame oil, season with black pepper, and garnish with the remaining green onion tops before serving.