For the best, fresh Indian food, try Mahesh Lunch Home on the Juhu Road. You can choose your own (huge) live crab and have it cooked in whatever way you like. All their fresh fish is fantastic. It's also very reasonably priced. You'll find it 100-200 yards from the JW Marriott, Juhu as you turn left out of the hotel.
Juhu Road, Juhu, Mumbai