Hole-in-the-Wall Indian Restaurants
I like Taj Chaat House in Irving http://www.yesandyesfoods.com/page11.html
I also like Subzi Mandi in Irving or Richardson. Subzi Mandi is an Indian supermarket, but if you go to the back of the store, you'll see a little eatery, where the food is good and cheap.
http://www.subzimandidallas.com/resta... (click on menu on the lower right corner)
Taj Chaat House
1057 W Rochelle Rd, Irving, TX 75062