Fry the finely chopped onion, garlic, and chilli in vegetable oil until soft. Ensure the pan is on a low to medium heat to avoid burning anything.

Add your spices and cook on a low to medium heat until fragrant.

Add the flour to the pan and cook it off a bit, it's this roux which will make your sauce deliciously thick and silky.

Add the stock bit by bit, stirring as you go, followed by your coconut milk. Finish with your sugar and soy sauce. Leave to simmer.

Strain through a sieve to make it super smooth.