Dry fry the coriander and cumin seeds in a small frying pan. Tip into a mini food processor with the chili, garlic cloves, ginger, turmeric, sugar and 1 tablespoon of the oil. Blitz to make a paste.
1 tsp coriander seeds, 1 tsp cumin seeds, 2 red chilies, 2 cloves garlic, 1 tbsp dark brown sugar or palm sugar, thumb sized piece fresh ginger, ½ tsp turmeric, 2 tbsp vegetable oil
Heat the remaining oil in a saucepan and add the mustard seeds. When the start to pop, add the your paste and stir together.
1 tsp mustard seeds
Thoroughly wash the curry leaves and pat dry. Add to the pan with the onions and sweat over low heat for 10 minutes.
10 curry leaves, 2 white onions
Add the coconut milk and lime juice and bring to the boil.
14 oz (400g) coconut milk, juice of half a lime
Add the vegetables then lower heat to a simmer. Cook for 15 minutes or until the potatoes and aubergines are tender and just starting to fall apart.
14 oz (400g) baby eggplant, 3 large potatoes
Serve with rice, extra lime wedges on the side and garnish with fresh coriander leaves.
lime wedges and steamed rice to serve, fresh cilantro