Tomato and Chilli Relish

This sauce goes the whole nine yards. You can make it as hot as you like, just subtract or add chillies to achieve your desired level. You can use it as a sauce for just about anything you like. It lasts for one week. Peel, deseed and chop 15 vine-ripened tomatoes. Put a saucepan on the stove and add 2 finely chopped brown onions<