Preheat the oven to 220°C.
Brush the cabbage halves with olive oil and place cut-side down in a hot ovenproof pan. Cook for 4–5 minutes until deeply charred, then transfer to the oven for 12–15 minutes until tender.
Meanwhile, melt the butter and whisk in the miso, tamari, rice vinegar, maple syrup, garlic and sesame oil.
Toast the sesame seeds in a dry pan, then mix with the chopped nuts.
Spoon the miso butter over the cabbage and return to the oven for 2 minutes until glossy and sticky.
Finish with the sesame crunch, spring onion, coriander, black sesame seeds and a drizzle of chilli oil. Serve with lime wedges.
