I used the following base gravy. I can't remember from where exactly but from a YouTube video. Filmed in a restaurant by CBM I think:
BASE GRAVY
STAGE (1).
VEGETABLE BASE: BOIL : ONIONS, POTATOES, CARROTS, GARLIC & GINGER PASTE, PEPPERS, CORIANDER ROOTS & STEMS, MOONG DAHL, COCONUT BLOCK, TIN TOMS, TURMERIC, GHEE, OIL & WATER AND SALT.
STAGE (2).
AKHNI STOCK: BOIL : ASIAN BAY LEAVES, CASIA OR CINNAMON STICKS, GREEN CARDAMONS, BLACK CARDAMON, 1 tsp FENNEL SEEDS, 1 tsp CUMIN SEEDS.
STAGE (3).
TOMATO BASE: PUT OIL IN PAN AND HEAT UP. ADD GARLIC & GINGER PASTE THEN ALMOST STRAIGHT WAY ADD BLENDED TIN TOMS. ADD CURRY POWDER. COOK A BIT. ADD WATER. KEEP COOKING.
ADD AKHNI STOCK (2) (STRAIN IT) TO VEGETABLE STOCK (1) - NOW BLEND TOGETHER.
ADD NEW BASE GRAVY (1) & (2) TO TOMATO BASE (3) AND STIR IN TOGETHER AND KEEP COOKING. WHEN ITS ABOUT DONE ADD CARNATION EVAPORATED MILK, STIR TOGETHER AND SWITCH OFF HEAT.
ITS DONE.
Mr. Punter