In any khau galli you'll go, you'll always find amazing dosa, pasta, sandwich, etc. I think if you're looking forward to go somewhere less crowded but still want all those things, try coming to Matunga, King's circle.
Khau gali, ghatkopar west
khau gali, mira road,
khau gali, churchgate,
vada pav in dadar west near station
khiciya papad in bhuleshwar market,
30 type of tea in mazid bunder near by railway station and the list go on.
Depend on which part of mumbai u r in
western - Juhu
south - khau galli church gate
central - Ghatkopar o Mulund
all places near by walking distance n also available on Google map
nothing found u tasty so just eat Vada Pav from anywhere