Heat oven to 425°F (220°C). Line a sheet pan with parchment or foil for easy cleanup.
Make the Soy-Miso Glaze: In a small bowl, whisk together miso, Thaimee All-Purpose Sauce, sesame oil, and vinegar until smooth and brushable. If needed, add a tiny splash of water to loosen.
Arrange the Pan: Place the salmon skin-side down on one side of the pan. Toss broccolini with olive oil, a pinch of salt, and black pepper if using. Spread on the other side in a single layer.
Glaze & Roast: Brush the salmon generously with the soy-miso glaze. Roast for 10–12 minutes, until the salmon is just cooked through and flakes easily, and the broccolini is tender with lightly charred edges.
Optional Broil: For extra caramelization, broil for 1–2 minutes at the end — watching carefully so it doesn’t burn.
Finish & Serve: Sprinkle with scallions or sesame seeds if desired. Serve straight from the pan with a squeeze of citrus.