I've got a few different ones that I make from scratch, they're adapted from the Modernist Cuisine cookbook from 2011.
These are a couple of recipes from the book, I tend to round up or round down the amounts and not worry overly if i don't have all the ingredients. Eg use ordinary sugar and vinegar when I don't have the fancy stuff or butter when I don't have ghee
The first one is a vindaloo (Portuguese style) Goan curry sauce, it's not like a typical British curry house vindaloo at all, it's very mild indeed. If you do like a bit of a kick to your curry you will need to add some chilli to this
Sliced onions 120g
ghee 35g
saute until lightly golden 10 mins
tomato puree 60g
grated garlic 7g
grated ginger 7g
add to onions and saute for 5 mins
black peppercorns 5g
green cardamom seeds 4.2g
grated turmeric 4g
fennel seeds 3.4g
coriander seeds 2.4g
cumin 2.4g
yellow mustard seeds 2g
toast in shallow pan in 170C oven until golden and aromatic 10-15 mins
grind to fine powder in coffee grinder or blender
add to tomato & onion mixture and saute until fragrant 10 mins
water 250g
cane vinegar 40g
raw cane sugar 12g
bay leaf 0.5g
combine with sauce simmer for 45 min
lime juice to taste
salt to taste
season sauce to taste
The second is a coconutty Keralan curry
minced shallots 120g
ghee 35g
green chilli 12g
saute until shallots are golden about 10 mins
grated garlic 10g
grated ginger 10g
fresh curry leaves [not dried] 5g
bay leaf 0.5g
add to shallot mixture and saute for 5 mins [I found that if you're using dried curry leaves you only need 3 or 4]
black peppercorns 14g
cumin seeds 4g
green cardamom seeds 3g
star anise 1.4g
cinnamon stick 1g
whole cloves 1g
toast in shallow pan in 170C oven until golden and aromatic 10-15 mins
grind to fine powder in coffee grinder or blender
add to shallot mixture and saute until fragrant 5 mins
coconut milk 140g [I've found that something like 200g or 250g works better]
add to shallot mixture and simmer for 45 mins
season with salt to taste