Preheat your oven to 250C (480F). Trim broccolini and place in a roasting pan. Drizzle with a little oil and pop in the oven for 5 minutes.

While the broccolini is cooking stir together miso, mayo and vinegar. Taste and season with more miso and/ or vinegar as needed.

After 5 minutes, stir the broccolini and top with fish. Roast for another 8-12 minutes or until fish is cooked to your liking.

To serve, smear miso mayo over two plates. Top with fish and broccoli and sprinkle with sesame seeds.