The hotel provides a buffet breakfast. In the evening they serve a three-course meal (generally soup, a main course and a sweet dessert. Fruit may be available as an alternative for dessert). There isn't a choice of meal but they have indicated that they can cater for dietary requirements. We find that hotels in continental Europe don't tend to be as used to dealing with dietary requirements as those in the UK, so the alternatives may be limited and they may not have considered cross contamination, for example.
We pass on dietary requirements to the hotel before the group arrives. Please check though with the restaurant staff that they have received this information and that the food you are being given is suitable.