Dice the pork loin into small, half-inch cubes to mimic the texture of traditional pork belly while keeping it lean.
Heat avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the pork cubes to the skillet, season with sea salt and black pepper, and sear until golden brown and cooked through.
Stir in the minced garlic and grated ginger, sautéing for about 30 seconds until the aromatics are fragrant.
Add the chopped kimchi to the pan and sauté for 2 minutes, allowing the juices to reduce and the kimchi to slightly caramelize.
Add the cooked brown rice and tamari to the skillet, breaking up any clumps and pressing the rice down with a spatula to crisp the bottom for 3 minutes.
Drizzle the toasted sesame oil over the rice and stir in half of the sliced green onions.
In a separate small non-stick pan, fry the egg to your preference, ideally sunny-side up to keep the yolk runny.
Divide the fried rice into a bowl and top with the fried egg and the remaining sliced green onions.