Les Truffieres
We haven't found a dedicated web site for this resturant, so have linked above to Trip Advisor. For authentic South West France food in a friendly atmosphere at a reasonable price, you have to go a long way to beat this place. Duck everything of course and there is no menu choice - althogh they will find a substitute for the Fois Gras for instance. €27 approximately including wine.
Chez Julienne
Again, we have provided a Trip Advisor link for this. The food is first class and the setting, by an old Abbey, is remarkable. In 2012, there were 3 course menus at 18 and 22 Euros. Well worth a visit.