good suggestions so far.
that place on 7th and 23rd is your standard chexican fare. not bad, as it goes. all of those 'tortilla' places are exactly the same!
dumpling house on eldridge - excellent suggestion. i avoid the greasy dumplings there, but go for the $2 boild veggie dumplings. douse them in hot sauce and top it off with a sesame pancake for 50 cents. excellent.
punjabi is also a great suggestion. $2 for a small rice with mystery veggies #1-5 (i just pick two at random, never sure what's what. they're all good). i recommend adding a fried samosa covered in tamarind sauce for another 75 cents.
punjabi usually gives me those "uh oh" gastro rumblings an hour or two later.