
Chip shop curry sauce is a uniquely British thing - it's a pale imitation of the rich gravies that we know and love from the Indian sub-continent. It's quick and easy to make, and delicious poured over chips.

Whizz everything into a blender until you have a smooth paste the consistency of paint. Return to the pan, and check the seasoning. If your sauce seems too runny, you can sift in some flour to thicken it.
1 medium onion
250 ml plain yogurt
250 ml chicken stock
2 tsp curry powder
1 tsp ground ginger
1 tsp ground turmeric
1 tsp ground cumin
half a tsp red chilli flakesVegetable oil for cooking the onions. Flour to thicken the sauce.