Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
In a small bowl, whisk together the tamari, honey, hoisin sauce, toasted sesame oil, grated ginger, minced garlic, and five-spice powder to create the glaze.
Pat the pork tenderloin dry and season lightly with sea salt and black pepper.
Place the pork on the baking sheet and brush generously with half of the glaze.
Roast the pork for 15-20 minutes, brushing with the remaining glaze halfway through, until the internal temperature reaches 145°F.
While the pork roasts, heat avocado oil in a large skillet over medium-high heat.
Add the broccolini and baby bok choy to the skillet with a splash of water, cover, and steam for 3-4 minutes until bright green and tender.
Remove the pork from the oven and let it rest for 5 minutes before slicing into medallions.
Serve the sliced pork alongside the tender greens, drizzling any remaining pan juices over the top.