Re: chicken karahi ......
I'm not good with quantities either, but this is how I make it.
Heat up oil, and brown some ginger paste. Add chicken, and keep frying until it turns brownish. Take it out, and in the same oil, brown up some garlic powder. Add tomatoes, salt, black pepper, haldi, cumin seeds, and a little bit of lemon juice. Keep frying until the water evaporates, and oil separates. Add your chicken back in, and 'dum' it for 10 minutes.