The local cuisine here is dominated by south Indian delicacies which mainly include coconut or rice. Foods like idli, vada, dosa, sambhar are a speciality and even in the most modest hotels, you'll find some really good tasting food. Filter coffee is also famous here.
Also, if you have a knack of picking out well, there are fresh fruits available that can be quite refreshing. You can also have tender coconut which is available in plenty.