Put all the spice powder ingredients into a spice or coffee grinder and blitz to a fine powder. Blitz the garlic and ginger to a fine paste using a food processor, then tip into a bowl with the lamb mince and stir well to combine. Set aside.

Heat the oil in a heavy-bottomed frying pan over a medium heat. Add the curry leaves and let them sizzle for a couple of minutes. Tip in the onions and fry for 5-7 mins until softened and light brown. Add the tomatoes and fry over a medium heat until they can be mashed slightly with the back of a spoon (about 5 mins). Stir in the chillies, coriander, chilli powder and turmeric, frying for a couple of minutes.

Add the marinated lamb and keep stirring over a medium heat, breaking down the mince to make sure there are no lumps. Cook for 5 mins, then add 150ml water. Bring to the boil, then simmer on a low heat with the lid half-covering the pan. Cook the lamb for 20 mins or until it’s almost absorbed all the water.

Mix in the coconut milk and powdered spice mix, and simmer for 5-7 mins. Add the sugar, vinegar and seasoning, and stir well. Cook for another 5 mins, then turn the heat off and garnish with the extra coriander and lemon juice. Serve warm with the toasted, buttered rolls, red onion and lime wedges.