Vegetarian food is very popular in India and is available in most (if not all) restaurants. The entire holy city of Pushkar is vegetarian only. Your indian driver will most probably be vegetarian himself. So do not hesitate to ask him for a good place to have a typical (but safe) indian lunch or dinner. If you want to find out more about Indian vegeterian cuisine, check out this blog: www.archanaskitchen.com
If you feel a little adventurous, you can ask your indian driver to make you discover some local specialties. Your driver will always take food safety into account.