Whisk together the dressing ingredients in a bowl then taste and add seasoning if needed.
Toss together the red cabbage, onion, apples and turnip in a big bowl. Pour over the dressing and toss again to coat thoroughly.
When you’re ready to serve, roughly tear the coriander and mint leaves from their stalks and add to the salad with the peanuts. Toss everything together once more and pile onto plates. It’s delicious with rice noodles or crispy chicken.