Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a small bowl, whisk together the gochujang, tamari, honey, toasted sesame oil, grated ginger, and minced garlic to create the chili glaze.
Pat the cod fillets dry with a paper towel and season lightly with sea salt and black pepper.
Place the cod fillets on one side of the baking sheet and the sliced shiitake mushrooms and halved baby bok choy on the other side.
Brush the chili glaze generously over the cod fillets and lightly toss the vegetables in any remaining glaze or a tiny drop of sesame oil.
Bake for 12-15 minutes until the cod is opaque and flakes easily with a fork, and the vegetables are tender-crisp.
While the fish roasts, bring the vegetable broth and shelled edamame to a gentle simmer in a small saucepan over medium heat.
To assemble, divide the hot broth and edamame between two deep bowls.
Carefully place the roasted bok choy and mushrooms into the broth, then top with the glazed cod fillets.
Garnish with toasted sesame seeds and thinly sliced green onions before serving immediately.