Preheat the oven to 180°C.
Prick the aubergine all over with a fork and place it on a baking tray.
Roast for 25–30 minutes (or air fry), until the flesh is completely soft. You should be able to easily pierce it with a fork.
Leave to cool slightly, then scoop out the flesh into a food processor.
Add the tahini, miso paste, rice vinegar, spring onion, and garlic (if using).
Blend until smooth.
Add a splash of soy sauce and blend again. Taste and adjust if needed.
Transfer to a bowl and finish with sesame seeds and extra spring onion.
Serve with toast, raw vegetables, or crispy flatbreads.