Try shut eat up, chalte firte momos ,street food villa , Gopal ji chaat wale
There's the market with giri momos that also has a stall for chat and another for rolls. Shankar fast food . A couple of vans near north ex mall which might be tough to locate though
My suggestion would be Shankar fast food.
Billu's hut (NSP) is good and for the momos kinda stuff BN momos and AS momos near saraswati vihar are very nice.
Backyard and Blackjack 👍🏻👍🏻
The Backyard is good
and if you're asking for street food then go with Gupta Chat corner