Blackberry Cheese

• 2 lb. blackberries
• 1 lb. cooking apples (unpeeled)
• ¼ pi

Wash the fruit and chop apples roughly. Simmer in water until soft. Rub through a fine sieve and weigh the pulp. Return to pan with the sugar. Dissolve sugar carefully, then bring to the boil and boil gently until a semi-solid consistency is reached. Pour into prepared jars.