Slice the pork tenderloin into bite-sized cubes and the pork belly into small lardons.
In a small bowl, whisk together the gochujang, tamari, minced garlic, and grated ginger to create the glaze.
Place the pork belly lardons in a cold skillet over medium heat, allowing the fat to render until the bits are golden and crispy.
Increase the heat to medium-high and add the pork tenderloin cubes to the skillet, searing until browned on all sides.
Pour the gochujang glaze over the pork, tossing to coat thoroughly until the sauce thickens and becomes sticky.
In a separate pan, lightly sauté the cauliflower rice and cooked brown rice together with the sesame oil until heated through.
Toss the sliced cucumbers with rice vinegar, sea salt, and black pepper in a small bowl for a quick pickle.
Assemble the bowl by layering the rice blend, the glazed pork mixture, and the pickled cucumbers, finishing with sliced green onions.