Dear student,
Since the Indian School of Business & Finance is located in Delhi, which is part of North India, the chances are that the food served in the canteen would contain onion and garlic. Getting Jain food is a bit difficult in the common mess or canteens of any institution since a large population is catered. However, you can confirm the same from your Admission Coordinator during the Indian School of Business & Finance admission process.
We hope this helps! For any further queries, please feel free to reach out to us!