Thinly slice the pork tenderloin and pork belly into bite-sized pieces.
In a small bowl, whisk together the gochujang, coconut aminos, sesame oil, grated ginger, and minced garlic.
Toss the cucumber slices with rice vinegar and a pinch of sea salt in a small bowl; set aside to quick-pickle.
Heat a large skillet over medium-high heat and add the pork belly first, rendering the fat until it becomes golden and crispy.
Add the pork tenderloin to the skillet and sear until cooked through and caramelized by the rendered fat.
Pour the gochujang sauce over the meat and toss for 1 minute until the sauce is thickened and glossy.
In a separate pan, sauté the cauliflower rice with the remaining salt and pepper until tender and fragrant.
Serve the crispy pork over the cauliflower rice, topped with the pickled cucumbers, sesame seeds, and sliced green onions.