I joined an Indian curry making forum a few months back. Basically the forum administrator's (Cory Ander) aim is to recreate the British style Indian restaurant curry experience at home. A lot of the recipes come from Indian restaurants from around the country and while we here at JBK go on brewery tours with note pads, these curry heads visit their local curry houses for demos then give all the secrets away on the forum afterwards!
Basically, every curry house has its own house base sauce/gravy. This sauce/gravy will be the backbone to all the curries created in that restaurant. One of the forum members found out the base sauce for the Saffron Indian restaurant in Lincoln and shared it on the forum. I make a large batch of this and freeze it. One batch makes me 17 curries!
The actual curry making part is really easy. I can knock up a curry in around 15 mins. Obviously that doesn't include making the rice.
If you like Indian curry house food and enjoy cooking, join the forum!! http://cr0.co.uk/curry/index.php
Here are pictures of my curries. I can 100% confirm, these curries ARE the curry house style curries I've always dreamed about creating at home.
Making the base sauce/gravy:

After cooking for a while and whizzing it up:

Making the chicken Tika. Have since bought skewers!

And finally, the finished Garlic Chili Chicken:

Here are my curries and Chapatti bread from last week:
Chicken Jalfrezzi. Tasted amazing - just what I'd expect from a good quality curry house. However, I'd like it to be redder next time so will use a different chilli powder.

Jalfrezzi, Pilau rice, Chapatti bread and more Garlic Chilli Chicken.

I've also made Chicken Korma, Dhansak and Madras. The Madras is the easiest to make. Basically base sauce, spices and whatever meat you want.
I don't want to give the recipes away here as I think it would be discourteous to do so. Join up if you're interested. You won't regret it.

http://cr0.co.uk/curry/index.php
Mmmmm curry......