I can vouch for the earlier suggestions of Lahore Tikka House on Gerrard. It's cheap, really good, and the servings are enormous.
I recently tried the lunch buffet at Little India on Queen, and it was quite good, and at that price you can't go wrong.
Some good ones that nobody has mentioned yet:
Jodhpure Club in Baldwin village, Bombay Palace at Jarvis and Adelaide (though pricey) and Chutney's at Bloor at Montgomery, which might be my favourite.
I've also heard that Dhaba at King and Peter is excellent, though fancier (ie expensive) but I haven't been there yet.