Everyone I know likes them – hot, toasted, full of sliced vegetables, melted cheese and spicy green chutney.
I’ve noticed that these sandwiches tend to be almost exclusively vegetarian. I suppose that’s part of the definition of a Bombay Sandwich. And there’s usually a fixed set of veggies that go into it – cucumber, tomato, potato (very important), onion, beetroot, capsicum. And the bread is always soft and white, no fancy healthy alternatives like brown or multigrain.
Some sandwich-walas add their own special twists to the sandwich. The one near my college, for example, tops his sandwiches with crunchy sev; really nice! The one near Podar College offers chocolate and cheese sandwiches, which seemed popular among the students.
The Making of a Bombay Sandwich
...thick wedges of boiled potato, and sprinkle generously with sandwich masala (a KEY ingredient). This sandwich-wala perhaps makes his own masala. When asked, "Bhaiya ismein kya hai?" he said "Ismein toh jahaan hai" :). But one could recreate this sandwich at home using sandwich masala from Kapol or Tid-bit.
Add onion, beetroot (ooh, colourful) and a ton of grated cheese...
Tomato, more masala, and finally it's ready to be toasted...
... using this contraption-thing (we have one just like it at home).
It comes out hot and golden-brown. Cut into pieces, top with more chutney, more grated cheese, or both.