TT, use this base, i honestly cant beat it i go back to it every time [its scaled down version of ashoka recipe base]
1kg onions
3 tsp cumin powder
3 tsp salt
water to cover the onions
Add 35 gms of Tomato paste
35 gms of the Garlic/Ginger paste
1 tsp of Chili powder
1 tsp Curry powder
2 tsp Turmeric
50 gms block of Coconut block
80 gms Vegetable margarine
80 mls of oil
Place onions, cumin powder, salt in pot and cover with water and bring to the boil before simmering until onions are soft.
make sure the onions don't become dry keep your eye on the water.
Once soft add the remainder of ingredients then blitz with blender and continue to gently simmer for 1 hour