Turn the pieces over with your hands and season.

Roast for 15-20 mins, tossing them halfway through cooking, or until they are dark golden and soft.

2)Heat the rest of the oil in a flameproof casserole dish and cook the onions over a medium heat until they are soft and pale gold.

Add the ginger, garlic and chilli, and cook for another 3 mins, then add the turmeric, coriander and cardamom pods (leave the pods whole).

Stir for 1 min, then add the tomatoes and seasoning.

Cook over a medium-low heat until the tomatoes begin to soften, stirring, then add the coconut cream, 75ml water and the aubergine.

3)Bring to just under the boil – if it boils, the coconut cream will split – then turn down to a gentle simmer.

Simmer for 30 mins, stirring every so often.

Add the lime juice to taste, and check for seasoning.

Add a pinch of sugar if it needs it. Stir in the coriander and serve with rice or naan breads.