Dice the pork tenderloin and pork belly into small, uniform 1-inch cubes.
Season the pork pieces evenly with the garlic powder and ginger powder.
Place the pork belly in a cold non-stick skillet and turn the heat to medium-high to render the natural fats.
Once the belly fat begins to sizzle and melt, add the pork tenderloin cubes to the skillet.
Sear the pork for 6-8 minutes, tossing occasionally, until all sides are golden brown and crispy.
In a small bowl, whisk together the gochujang, coconut aminos, and rice vinegar to create a smooth glaze.
Pour the gochujang glaze over the pork and toss for 1 minute until the sauce is thick, sticky, and coats every piece.
Place the warm cooked brown rice in the base of a bowl.
Top the rice with the glazed pork, sliced cucumber, and kimchi.
Garnish the bowl with thinly sliced green onion and sesame seeds before serving.