Upvote:5
I can't give you any specific information about the Palace on Wheels, but I can tell you that Indian's are very accommodating to people with dietary restrictions. Indian culture encourages individuality in religious practice, and that individuality often shows up as self imposed dietary restrictions (Gandhi is an excellent example). In rural parts of India you will have difficulty communicating your specific dietary restrictions, but the Palace on Wheels is generally something that only foreign tourists or wealthy English speaking Indians take. So, I expect that you won't have any problems getting properly fed aboard the train.