Tomato Chutney | How to make tomato Chutney at home

900g tomato
4 peppers, 1 large aubergine (total weight of about 900g/2lb)
700g onion, peeled and fairly finely chopped, by hand or in a food processor
4 fat cloves garlic, crushed
350g granulated sugar
300ml/½pint white wine vinegar or distilled malt vinegar
1 tbsp salt
1 tbsp coriander seeds, crushed
1 tbsp paprika
2 tsp cayenne pepper (optional)