I made this using apples from my friends garden and it worked really well. My pan was too small so I put a 1/4 of the ingredients in a smaller pan and added a load of chilli (and a little to the large pan.I also added the left over bits of a red pepper and used some brown sugar with the caster, I used slightly less vinegar.
Don't bother faffing with the muslin bag- the mustard seeds are fine in the chutney- they also look nice.
It made 4 small jars and one big jar. A great recipe that you can adapt to taste in a million ways.