TheFork users who ate in Saverne have said really good things about Hôtel Restaurant Au Lion d'Or, Là-Haut and L'Auberge du Parc. Maybe you should give them a try!
Some of the more popular Traditional restaurants having a terrace in Saverne according to TheFork users include:
Crock & Mâche, with a 9.5 rating
Hôtel Restaurant Au Lion d'Or, with a 8.8 rating
Au Saumon, with a 9 rating
In those days what better than a traditional restaurant to retrieve the comfort of eating at home.