Dice the pork tenderloin into 1-inch cubes and the pork belly into small 1/4-inch pieces.
In a small bowl, whisk together the gochujang, coconut aminos, minced ginger, and minced garlic to create the glaze.
Heat a large skillet over medium-high heat and add the diced pork belly, cooking until the fat renders and the bits become golden and crispy.
Add the pork tenderloin cubes to the skillet with the pork belly, seasoning with sea salt and black pepper, and sear until cooked through and browned on all sides.
Pour the gochujang glaze over the meat and toss for 1-2 minutes until the sauce thickens and coats the pork beautifully.
In a separate pan or microwave, steam the cauliflower rice and combine it with the cooked brown rice for a high-volume base.
Assemble the bowl by placing the rice mixture at the bottom, topping with the glazed pork, kimchi, sliced cucumber, and a drizzle of sesame oil.
Garnish with fresh green onions and serve immediately while the pork is sizzling and hot.