Blackberry and Apple Jam

• 4lb/2 kg blackberries
• ½ pint/250

Wash the blackberries and remove any stems and unripe berries. Put the berries into a pan with half the water and simmer until tender. Peel, core and slice the apples, and cook in the remaining water until soft but not broken. Combine the two fruits and liquid in one pan, and stir in the sugar over low heat until dissolved. Boil hard to setting point, pour into hot jars and cover.