4 red chillies, chopped
10 fresh curry leaves (or 15 dried leaves)
bunch fresh coriander, roughly chopped
2.5cm/1in piece fresh root ginger, grated
2 onions, finely chopped
700g/1lb 9oz d茅sir茅e potatoes, halved
2 tomatoes, finely chopped
450g/1lb plain flour
2 tbsp urid dal
1 tsp cumin seeds
2 tsp mustard seeds
salt, to taste
陆 tsp fine salt
100驳/3陆辞锄 strong white flour
2 tbsp sunflower oil
1 tsp ground turmeric
75g/2陆oz cold unsalted butter
1 free-range egg yolk, beaten, to glaze
100驳/3陆辞锄 solid vegetable fat (such as Cookeen or Trex), plus extra for greasing