There is no such thing as tiffin or diner service available in Doha.. Most people cook at home, at it is more economical than eating outside. For example if you cook at home, you can manage the expenses within QR 400 per month. Eating outside will cost you double the amount. There are many restaurants in Doha run by Indians and some of them cater to the needs of people from a particular region. You will find restaurants managed by Keralites, Hyderabidis, Bengalis etc. Some localities with a major population of Indians have many such restaurants. But it is advisable you get to learn at home the basics of cooking before you move over. It will be to your great advantage.