In a small bowl, whisk together the gochujang paste, tamari, toasted sesame oil, raw honey, grated ginger, and minced garlic.
Thread the cubed pork tenderloin and pork belly onto wooden or metal skewers, alternating the pieces for even fat distribution.
Brush the skewers generously with the gochujang marinade on all sides, reserving a small amount for a final glaze.
Preheat a grill or cast-iron grill pan over medium-high heat and lightly grease with a high-smoke point oil if necessary.
Grill the skewers for 3-4 minutes per side until the pork is cooked through and the edges are beautifully charred and caramelized.
Place the halved baby bok choy on the grill for 2 minutes until slightly wilted and marked with grill lines.
In a separate bowl, toss the sliced cucumber with rice vinegar, sea salt, and black pepper for a quick, refreshing side.
Serve the skewers hot alongside the grilled bok choy and chilled cucumber salad.