Dice the pork belly and pork loin into small, uniform cubes.
Heat a large skillet over medium-high heat and sear the pork belly until the fat renders and it becomes golden and crispy.
Add the pork loin to the skillet, seasoning with garlic powder, sea salt, and black pepper, and cook until browned through.
Stir in the cauliflower rice, cooked jasmine rice, and chopped kimchi, pressing the mixture down firmly into the pan to allow the bottom to develop a crispy crust.
Whisk the tamari and gochujang together in a small bowl, then pour over the rice mixture, tossing to coat everything evenly.
Create a small well in the center of the pan, add the sesame oil, and crack the egg into it, frying until the whites are set but the yolk remains runny.
Garnish with thinly sliced green onions and serve immediately while the rice is hot and crispy.