1. 53rd & 6th Halal Cart
The 53rd & 6th Halal Cart in New York City is the most popular and from my experience the most delicious food cart in the country. For about $5 you can get a gigantic portion of Indian style lamb, beef, or chicken with rice and pita.
I must have visited this food cart at least 3 times (ok more like 10). If you are looking for something that is equal parts cheap, quick, and tasty look no further. In fact, skip the gourmet meal and just eat street food. We spent $100 to eat dinner at Bobby Flay’s restaurant one night and would have rather had the Halal cart lamb any day of the week!
Street food will be a much more authentic NYC experience anyways. Your wallet and stomach will thank me.
2. 2 Bros Pizza
If you are looking for an authentic slice of NYC style pie, that is also cheap, check out 2 bros pizza. You can find a 2 bros pizza almost anywhere in NYC so they are quite convenient and the taste/service is pretty consistent, but the most popular location is in East Village (between 2nd Ave & 3rd Ave).
The slices of pizza cost you around $1 and are the size of a large infant. I challenge you to find a larger portion of food for less anywhere in NYC. There was a 2 bros pizza on the way to the subway from my hotel so I ended up grabbing a couple slices of $1 pizza more than a few times.