Cut the lamb neck into small, bite-sized cubes.
Warm a large pan for 1 min over a medium-high
heat. When warm, pour into 2 tsp oil. Add in the
lamb and cook for 5-6 mins, stirring till browned
on all sides. Lift the lamb out of the pan using a
slotted spoon and pop in a bowl. Take the pan
off the heat.
Peel and thinly slice the onion. Add 1 tsp more
oil to the pan and set over a medium heat. Add
the onion. Season and cook for 3-4 mins till just
softened. Add the curry leaves and 2 tsp garam
masala and 1 tsp turmeric. Cook for a further
1 min till the pan smells spicy.
Tip the lamb back into the pan along with any resting juices. Pour in the tin of chopped tomatoes. Half-fill the can with water (around 200ml) and add that in too. Season. Stir to mix. Pop on a lid and simmer for 25 mins.
While the curry is simmering, tear the kale leaves from the stems. Finely chop the stems. Set the leaves and stems aside for later.
Tip the flour into a bowl, saving 1 tbsp for later. Add in 1 tsp baking powder and a pinch of salt. Stir. Spoon in 2 tbsp yogurt and 1 tsp oil. Pour in 50ml water. Stir together and knead for 2-3 mins to make a soft dough.
Stir the kale into the lamb and simmer for another 5 mins. While the kale cooks, finish making your naans: sprinkle the reserved flour onto the work surface. Divide the dough into 2 balls. Press ½ tsp cumin seeds into each ball. Roll out into a thinnish oval shape. Brush each naan with ½ tsp oil.
Heat a frying pan over a medium heat. Place a naan in the hot pan and cook for 2 mins on each side. It should be golden with some bubbles. Place on a plate and cover with a tea towel while you repeat with the remaining naan.
Taste and season your lamb curry. Spoon into warm bowls. Top with spoonfuls of yogurt and a sprinkle of the remaining cumin seeds. Scoop up the fragrant curry with the fluffy naans.