250g frozen sustainable white fish, cut into bite-sized pieces
1 lime, juiced
1 tsp ground turmeric
3 tbsp vegetable oil or ghee
1 large onion, finely chopped
1 tbsp grated ginger
3 garlic cloves, thinly sliced
2 tsp ground cumin
2 tsp ground coriander
½-1 tsp chilli flakes or powder, or to taste
2 tbsp tomato purée
250g prepared diced butternut squash and sweet potato mix
200ml coconut milk
2 tbsp tamarind paste (optional)
small bunch of coriander, roughly chopped, or use mint
cooked rice, to serve (about 250g uncooked weight)