To make the Curry Paste: Dice the Onion and fry it off with the chilli with a little of the oil. Peel all the cloves of garlic and the ginger, then add to a food processor and blend with the remaining oil. Once roughly blended together, add all the spices, tomato puree, salt and the fried onion and blend to a smooth paste. Add a drop of water or more oil if needed to help the paste blended easier in the processor.