A spiced twist on the British classic, slow-cooked lamb is seasoned with garam masala, ginger, green chilli and tomatoes. The lamb is then topped with crispy, garlicky Nanna Tate potatoes, and served with a dollop of coriander yogurt and pickled red onions.
Preheat the oven to 150°C fan
Mix the diced lamb with the oil and a pinch of salt, then sear it off in a large pot until all of the pieces are browned all over. Remove and set aside
Add the onion, carrot and celery and cook over a medium heat. After a few minutes, add in the garlic, ginger and chillies
Cook down the vegetables until everything is soft, about 15 minutes
Next, add in the garam masala and flour. Cook out over a low heat for a minute or so then stir in the tomato paste
Mix in the spices and tomatoes, then add in the beef stock bit by bit, whisking after each addition initially so the flour doesn’t clump up
Add the lamb back to the pot then add in the rosemary, bay leaf and thyme. Season with salt and pepper to taste, depending on how salty your stock was
Cover the pot with a lid then place in the oven and slow cook for 5–6 hours, or until the lamb is extremely tender. Top up with extra stock as needed, if it starts to dry out
Next, make the pink pickled onions. Whisk together all of the ingredients for the pickle brine until the sugar is dissolved, then add in the sliced onions. Leave them to pickle in the fridge while the lamb cooks
Boil the potatoes in salted water for around 15 minutes or until tender, then drain and return to the pan to steam
Meanwhile, melt the salted butter with the cumin, garlic and nigella seeds. Cook the mixture until the butter is lightly browned, then transfer to a heatproof bowl
Preheat an oven to 180°C fan
Lay out the potatoes on a large baking tray lined with parchment paper. Use a potato masher to squish them down, making sure to keep them in one piece. Leave them to cool for another couple of minutes then drizzle with the melted butter
Season with salt and pepper then bake for 15 minutes. This is the first bake before they get placed over the lamb and baked again
Once the shepherd's pie base is ready and the lamb is tender, remove it from the oven and remove the herbs. Taste adjust the seasoning as needed
Transfer to a deep-sided baking dish. Layer the half-cooked smashed potatoes over the base, then drizzle with some more melted butter
Bake in the oven for around 25 minutes until the potatoes are crisp and cooked through
Mix together the coriander and yoghurt, and season with salt and pepper
To serve, spoon a generous portion of the shepherd's pie into a serving bowl, then serve with a dollop of the coriander yoghurt, pink pickled onions and a sprinkle of finely chopped chives
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