Add wheat flour, salt, red chilli powder and cumin powder and chopped coriander leaves to the bowl containing the mashed potato and cauliflower. Mix everything together and knead to a soft dough. There’s a lot of moisture in the boiled vegetables. So you may not need to add water. Sprinkle a little water if the dough appears too dry. When the dough has come together, add 2 tbsp oil and knead again for 2-3 minutes. Rest the dough for 10 minutes.