Clean and dice the fruit first of all. Weigh the required amount or measure the fruit juice.
Put the fruit or fruit juice in a large cooking pot. Set aside 2 tbsp sugar from the total amount and mix with the contents of the sachet. Stir the mixture into the fruit mixture or juice. Bring to the boil on a medium heat
Add the remaining sugar bring to the boil and leave to boil rapidly for at least 3 minutes.
If necessary skim off the contents and pour to the brim of the prepared glasses. Seal the jars with a screw cap and turn upside down immediately. Leave upside down for around 5 minutes.