The pilgrim canteen inside the ISKCON Mayapur complex, serving a wide menu of North and South Indian vegetarian dishes plus the obligatory pizzas, pastas, and lassis for the international devotees. Hygienic, air-conditioned, and inexpensive — most thalis around ₹150-250.
The prasad lunch (donation-based) served separately in the main canteen is even cheaper and more authentic, if you don't mind sitting on the floor. Both close between meal services.