Preheat your oven to 400°F and prepare the brown rice according to package directions.
In a small bowl, whisk together the honey, coconut aminos, hoisin sauce, sesame oil, minced garlic, grated ginger, and Chinese five spice to create the marinade.
Season the pork tenderloin evenly with sea salt and black pepper.
Heat a large oven-safe skillet over medium-high heat and sear the pork for 2 minutes per side until a golden crust forms.
Brush half of the honey-garlic glaze over the pork and transfer the skillet to the oven for 12-15 minutes, or until the internal temperature reaches 145°F.
While the pork roasts, steam the bok choy over boiling water for 3-5 minutes until the stems are tender-crisp.
Remove the pork from the oven, brush with the remaining glaze, and let it rest for 5 minutes before slicing into medallions.
Serve the sliced char siu pork over the fluffy brown rice alongside the steamed bok choy.