The comments about the base source are correct, its too thin. Chop two onions,one garlic bulb, one piece of ginger and a green chilli, fry until soft and then add 1 and half pints of water. (tip place garlic bulb in microwave for 45 seconds it makes it simple to peel)Simmer for an hour. Then crush two teaspoons of cumin seeds and two teaspoons or coriander seeds together. Fry them in a pan with one teaspoon of paprika and one and half of tumeric. When heated through add a tablespoon of tomato puree. Then add a tin of blended tomatoes cook for 20 mins. Then add both together and blend and then cook for another 20 mins. You will then have a good base source. Make in batches and freeze if needed. If you want it thicker add less to the pan and cook it down.