Roughly chop up 3kg tomatoes, 2 onions and 5 apples. Bring to the boil in a large, heavy-based pot and simmer gently for 30 minutes, or until the tomatoes and apple are soft and pulpy.
Cool slightly and press through a sieve. Return sieved mixture to pot.
Add 1 ½ cups cider vinegar, 2 table spoons of salt, 750g brown sugar, ½ teaspoon pepper, a pinch of cayenne, 1 tablespoon mustard powder and the juice of two lemons.
Add a spice bag containing q teaspoon each of whole cloves, whole allspice and chopped fresh ginger. Bring to boil stirring until sugar is dissolved. Boil gently, uncovered for 1 ¼ hours.
Remove spice bag, pour mixture into hot, sterilized bottles and seal.