Soak four wooden skewers in water for at least 20 minutes to prevent burning.
Cut the pork tenderloin and pork belly into uniform 1-inch cubes and place them in a medium glass bowl.
In a small jar, whisk together the gochujang, coconut aminos, toasted sesame oil, grated ginger, and minced garlic until smooth.
Pour the marinade over the pork, tossing well to ensure every piece is coated, and let it marinate for 15 minutes.
Thread the pork onto the skewers, alternating between the lean tenderloin and the rich pork belly pieces.
Preheat a grill pan or outdoor grill to medium-high heat and lightly grease with a touch of oil.
Grill the skewers for 3-4 minutes per side, or until the pork is cooked through and the edges have a dark, caramelized char.
While the pork rests, quickly sauté the cauliflower rice in a non-stick skillet with a pinch of sea salt and black pepper until tender.
Serve the skewers over the cauliflower rice, garnished with fresh green onions and toasted sesame seeds.