Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
In a small mixing bowl, whisk together the oyster sauce, honey, tamari, sesame oil, grated fresh ginger, and minced garlic until the glaze is well combined.
Slice the baby bok choy in half lengthwise and cut the red bell pepper into thick strips, then place them on the prepared sheet pan.
Drizzle the vegetables with avocado oil and season with sea salt and black pepper, tossing them directly on the pan to ensure an even coating.
Place the salmon fillets on the sheet pan, nestling them between the vegetables so everything is in a single layer.
Brush approximately half of the prepared oyster sauce glaze generously over the top of the salmon fillets.
Roast in the center of the oven for 12 to 15 minutes, or until the salmon flakes easily with a fork and the bok choy stems are tender.
Remove the pan from the oven and brush the remaining glaze over the warm salmon for a glossy, flavorful finish.
Garnish the entire dish with toasted sesame seeds and thinly sliced green onions before serving.