- Prepare the spice mix by mixing all the ingredients together.
- Preheat the oven to 200°C, 180°C Fan, Gas Mark 6. Preheat a baking tray.
- Blanch the potatoes for two minutes in boiling water, drain and leave to cool.
- Toss through the spice mix and spoon over the baking tray. Spray with some cooking oil spray and bake in the oven until crisp for about 15-20 minutes, turning halfway through when golden and crisp.
- Stir the harissa or sweet chilli sauce through the yogurt and serve with the crisps, sprinkled with spring onion, chillies and coriander.