Serves 4
Mash Topping
1kg sweet potatoes
1 tsp salt
6 cardamom pods, cracked
peeled strips from 1 unwaxed lime and juice of ½ lime
approx 1 litre cold water
4cm piece fresh peeled ginger
Filling
2 cloves garlic, peeled
4cm piece peeled fresh ginger, peeled
1 onion
seeds from 6 cardamom pods
2 tsps cumin seeds
2 tsps coriander seeds
2 tbsp coconut oil
2 tsp garam masala
1 tsp chilli oil
1 tsp ground turmeric
500g minced lamb
1 x 400g can chopped tomatoes
50g chopped and pitted dates
1 tsp salt
2 tbsp Worcestershire sauce
4 tsp finely chopped pistachios
● Preheat the oven to 220C
●Start with the mash topping, cutting each of the sweet potatoes into approx5cm chunks.
● Put the unpeeled potato chunks into a large saucepan (with a lid) and add the salt, cracked cardamom pods and lime strips then add just enough cold water to cover.
● Bring to the boil, then reduce the heat slightly, put the lid on and cook for about 30 minutes – or until the sweet potato is tender – while you prepare the filling.
● Slice the garlic and ginger roughly, quarter the onion, and put them all into the bowl of a food processor with the cardamom, cumin and coriander seeds, and blitz until finely chopped.
● Heat the coconut oil in a heavy-based pan (with a lid), and then tip the paste in.
● Cook for a few minutes to soften, stirring frequently, then stir in the garam masala, chilli oil and turmeric, and tip in the lamb mince, turning it in the onion mixture and breaking it up gently.
● Add the chopped tomatoes, then fill the empty can with cold water and, swilling it around, pour this in too
● Season with the salt and Worcestershire sauce, then bring to a bubble, put on the lid, lower the heat and simmer for about 25 minutes, stirring a coupe of times to stop it catching on the bottom of the saucepan.
● When the sweet potatoes are cooked, drain them but keep the liquid, and leave until cool enough to peel away the skins. Put the potato into a large bowl.
● Mash the potatoes and slowly beat in some of the potato cooking water to make the mash easier to spread and squeeze in the juice of half the lime.
● Grate the peeled ginger for the topping on to a plate then spoon the grated ginger into the centre of a piece of kitchen roll. Quickly, pull up the edges of the paper so you have a little wrapped bag, then squeeze over the mash so the ginger juice will drip out. Beat this juice into the mash.
● 5 mins before the lamb filling is cooked, add the chopped dates and remove the lid and simmer for 5 mins. Spoon into an ovenproof dish approx 30 x 20 x 5cm deep and top evenly with the mash
● Place on an oven tray and pop in the oven for 30-35 minutes. The mash should be piping hot with the mince bubbling underneath.
● On serving, sprinkle 1 tsp of chopped pistachios over the top of each portion.