Place the hulled raspberries in a preserving pan and heat gently to draw the juice. It’s a good idea to crush a few near the base of the pan to start the juice off. Simmer for 5 minutes until the fruit is tender.
Add the sugar and allow to dissolve over low heat. Bring up to the boil and boil rapidly for 8–10 minutes when the setting stage should have been reached. Draw off the heat, sk