1 medium-sized cauliflower (about 500g/1lb 2oz), stem removed and finely chopped
2 thin green chillies, finely chopped
1 tsp coriander seeds, coarsley ground
2 tbsp fresh coriander, finely chopped
1 tbsp grated ginger
3 large baking potatoes (about 1kg/2lb 4oz)
1 large tomato, finely chopped
4 tbsp tamarind chutney, shop bought
1 tsp Kashmiri chilli powder or sweet smoked paprika
1 tbsp garam masala
陆 tsp nigella seeds
2 tbsp neutral oil, such as rapeseed oil
1 tsp salt
陆 tsp turmeric
3 tbsp butter or oil
6 large sesame burger buns, sliced in half