Finely dice the pork belly and chop the kimchi into bite-sized pieces, reserving any kimchi juice.
Place the diced pork belly in a large cold skillet or wok, then turn the heat to medium to slowly render the fat until the pork is golden and crispy.
Add the extra lean ground pork to the skillet, breaking it up with a spatula, and cook until browned and fully cooked through.
Stir in the minced garlic, grated ginger, and the white parts of the sliced green onions, sautéing for 1 minute until aromatic.
Add the chopped kimchi and gochugaru to the pan, stirring for 2-3 minutes to caramelize the kimchi slightly.
Incorporate the cooked brown rice, coconut aminos, sea salt, and black pepper, pressing the rice into the pan to ensure even heating and flavor absorption.
In a separate small non-stick pan, fry the egg to your preference, ideally leaving the yolk slightly runny.
Divide the kimchi fried rice into a bowl, top with the fried egg, and garnish with the remaining green onion tops.