Dice the pork tenderloin into small pieces and season with sea salt and black pepper.
Whisk the large eggs and egg whites together in a small bowl until well combined.
Heat the toasted sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the diced pork to the skillet and cook until browned and slightly crispy on all sides.
Stir in the minced garlic and the white parts of the sliced green onions, sautéing for one minute.
Add the chopped kimchi and gochujang, stirring to coat the pork and aromatics evenly.
Incorporate the chilled brown rice, pressing it down firmly into the pan to develop a golden crust for two minutes.
Pour the tamari over the rice and stir everything together to distribute the flavors.
Push the rice mixture to one side of the pan and pour the egg mixture into the empty space, scrambling until just set.
Toss the scrambled eggs into the rice mixture, garnish with the remaining green onions, and serve hot.