15th September 2004 (thanks to Pete again)
Ingredients
4 onions
2 teaspoon salt
600ml of water
1 cup oil
2 tomatoes
2 cloves garlic
1 huge spoon masala (a huge spoon is about 4 desert spoons)
1 ? huge spoon tomato puree
1 teaspoon chilli
2 teaspoon garlic powder
Slice the onions
Add to the pan with the water
Add salt and oil and bring to the boil
Cook for 20 minutes
Add garlic and chopped tomatoes
Cook five minutes more then puree
Add Masala mix
Simmer five minutes and add tomato puree and chilli powder and garlic powder
Simmer again for five minutes
That is it!
The sauce is much runnier than I thought.
I was little disappointed but maybe if it?s left a day it improves.
Masala mix proportions are:- 
4 curry powder, 2 cummin,2 coriander,2 turmeric and 1 garam masala