There is a good comeseum restaurant on Pf 1 of BZA. This has entry from two sides, one from platform 1 and other from the secondary entry/exit gate of pf 1.
Do try the south Indian thali. Cost is just Rs. 70. But quantity is ample. In this 70 Rs, you will be given two times thali, i.e once the thali will be given from counter and again as your rice get over, a waiter will come and fill up your thali again, thats totally free .
Thali consist of rice,dal,rasam,dahi,papad,bhaji, one seasonal...
more... sabji and yummy kheer. Do try once. If you parcel it, then the quantity would be bit less. But if eat at the restaurant only, the quantity would be ample.