Frozen fruit jam

Put the fruit in a large saucepan, add the sugar and lemon juice, then heat gently until the sugar dissolves and the fruit has defrosted, about 10-15 minutes. Put a saucer into the freezer.

Boil the jam hard for 5 minutes, then take the cold saucer out of the freezer and drop a little jam onto it. Allow to cool for a few seconds, then push the jam with your finger. If it wrinkles, it’s ready. If not, boil for another minute and try again until it does wrinkle. Allow the jam to settle for 10 minutes, then put into a sterilised jar to store for up to 6 months, or let it set and then chill and use within a couple of weeks.