Toast the spices in a dry pan for a few minutes, stirring constantly, until the mustard seeds start to pop and everything becomes fragrant.
Put the spices into a spice grinder and process until finely ground.
Transfer the spices to the bowl of a small food processor and add the rest of the ingredients. Process until it becomes a smooth paste. Scrape down the sides of the machine as necessary.
Store the curry paste in an airtight jar in the refrigerator. It should keep for about a month.
Notes
You will use approximately 4 tablespoons of the paste to make a curry for 4.This recipe adapted from Jamie Oliver