3 turkey steaks, cut into strips
1/2 large sweet potato, peeled and cubed
1 tsp medium curry powder
1/2 tsp ground turmeric
1/4 tsp ground ginger
1/4 tsp cumin seeds
1 tbsp vegetable oil
1/3 leek, diced
2 garlic cloves, crushed
1/2 lemon, juice only
1 cup (8 fl oz) 250 ml boiled water
2 tbsp double cream (heavy cream)
1 tbsp chopped fresh coriander
salt and freshly ground black pepper
2 white pitta breads, halved widthways