I made three little jars of Seville orange curd yesterday, to use up the last of my oranges. It's a touch of sunshine for February. My lemon curd recipe works for any citrus fruit, just mix and match. Long, slow cooking is the secret for a good curd. Use a double boiler or a heatproof bowl over a pan of hot water. Take your time! This recipe makes about 800g which should just about fill two standard size jam jars. Make sure that used jars are spotlessly clean and sterilise by warming in the oven. The curd should keep in a cool place in perfect condition for about three months.