Cut the pork tenderloin into 1-inch cubes to mimic the traditional look of pork belly while keeping the meal lean.
In a small mixing bowl, whisk together the gochujang, coconut aminos, sesame oil, honey, grated ginger, and minced garlic.
Place the pork cubes in a glass bowl, pour the marinade over them, and toss to coat evenly for 15 minutes.
Slice the red bell pepper and red onion into 1-inch squares suitable for skewering.
Thread the marinated pork, peppers, and onions onto skewers, alternating the ingredients for a vibrant presentation.
Preheat a grill pan or outdoor grill to medium-high heat and lightly grease the surface.
Grill the skewers for 3 to 4 minutes per side, ensuring the pork is cooked through and the glaze is slightly charred.
Remove from heat and season with sea salt and black pepper.
Garnish with a sprinkle of sesame seeds before serving hot.