Below is a link to the list of a wide range of restaurants in South Mumbai (Colaba), where TIFR is located. Almost all restaurants receive payment by International credit cards and use of UPI apps such as Google Pay.
Most of these restaurants will also do home delivery at TIFR; you need to book via the app Swiggy or Zomato.
You may take a cab [Uber] or [Ola], booked using their App, or a local black-yellow cab [parked outside the TIFR Housing Complex] to reach any of these restaurants. You may also avail the very convenient Mumbai Metro Service.