Step 1: Tip the flour, spices, yeast, chilli, coriander and a generous pinch of salt into a bowl and mix together. Step 2: Preheat the oven to 180C/160C/gas 4. Pour half of the oil into a roasting tin and place in the oven to heat up. Tip the chips into a bowl and add the remaining oil, curry powder and a pinch of salt.