From the guy that taught me to cook Indian food the base sauce recipe from his restaurant in Greece.Some details are missing but i will give it a go.
recipe,
1 tin toms
1/2 kg red onions
4 cloves garlic
2 carrots
1 stick celery
1 inch square bit of ginger
1/2 cup veg oil
2 heaped d spoons curry powder
2 dessert spoons tom puree
3 " " " " " " Worcester sauce
1 " " " " " " garam masala
method
cut veg up place in sauce pan and boil When cooked set a side. Heat up the oil in a pan add the curry powder when bubble's come to serface add tom puree and cook for 2 Min's then add it to sauce pan bring to boil again then allow to cool add the Worcester sauce and garam masala then blend
Sorry did not get the water content in sauce pan but i would say just enough to cover veg,But you could all so use chicken stock in stead of water i think.
This is the recipe that came back with my in laws that went out there this week and ask my ex boss for it.I have not try this yet but he made very nice meals.
It seems very different to most base sauces ive seen or have you hard of this one before?
I will try it when i get the chance.
Andy