I notice you only use garlic puree and not the usual ginger/garlic mix that I see in most recipes.Adding mango chutney is another interesting ingredient....must give this a go.
I actually got a North Indian special on Friday delivered from a new place that posted me a menu.It's called the 'Elachi' in Purfleet.No idea what the place is like(it also does pizzas!!!) but the North Indian is the simply the best I've ever had.It lists among it's ingredients 'sour spices' whatever they may be but it's fantastic,you must give it go-I'd be interested to see if you can work out what gives it the extraordinary taste.
Lack of ginger was because i didn't have any garlic / ginger paste, only freshly made garlic puree. Haven't got round to doing that just yet. I used the mango chutney is to add a savoury sweetness which is very discernable in the dish. It doesn't seem to be the sweetness added by normal sugar - who knows!!
As for Elachi, not had anything from there. It's been around a while - formerly called Station Spice. It's a little shack right by the railway crossing at Purfleet. Doesn't look too salubrious but that wouldn't stop it turning out good TA nosh. How was the curry by the way??
As for the sour spices, the only spice i can think of that has been referred to as sour is mango powder (amchoor). Another option would be the inclusion of tamarind. I reckon my efforts so far scores 75%. With the addition of more precooked charred onions and peppers, half tsp of amchoor and one of tamarind concentrate i could push it a bit further

. Would be really interested in your feedback if you get round to having a go at the recipe. Never know, maybe it'll become a joint quest - the cracking of the North Indian Special
