In a small bowl, whisk together the raw honey, tamari, hoisin sauce, toasted sesame oil, five spice powder, grated ginger, and minced garlic to create the char siu marinade.
Place the pork tenderloin in a shallow dish or reusable silicone bag and pour over two-thirds of the marinade, reserving the rest for glazing; marinate for at least 30 minutes.
Preheat your oven to 400°F and heat the avocado oil in a large oven-safe skillet over medium-high heat.
Remove pork from marinade, season lightly with sea salt and black pepper, and sear in the hot skillet for 2-3 minutes per side until a golden-brown crust forms.
Brush the pork with half of the reserved marinade and transfer the skillet to the oven, roasting for 12-15 minutes or until the internal temperature reaches 145°F.
While the pork rests for 5 minutes, steam the halved baby bok choy for 3-4 minutes until the whites are tender but the leaves remain vibrant green.
Slice the pork tenderloin into medallions, drizzle with the remaining glaze, and serve alongside the steamed bok choy.