The quantities listed below are what I used, and that made 7 jars.
vegetarian, vegan, dairy free, gluten free
3 onions, chopped
750g tomatoes, chopped
750g marrow, diced (you may also prefer to peel it)
450ml white wine vinegar
4 small-medium cooking apples, peeled and diced
375g brown sugar
4 teaspoons all spice
1 1/2 tablespoons of mustard seeds
Thumb-sized piece of root ginger, peeled and grated
6 garlic cloves, crushed
Essentially you just put everything in a pan and simmer for a couple of hours, but there are more detailed instructions on the original recipe. Head over to http://notjustgreenfingers.wordpress.com/2014/08/15/purple-bullace-jelly-and-courgette-chutney/ for the how to.
Chutney-making friends of mine recommend putting the chutney in a cupboard for a good 6 months after making it to let the flavours develop.
This recipe tastes even better made with vegetables from Community Harvest Whetstone :)