Les Marronniers is a straightforwardly good lunch spot that is popular with locals, which in a tourist town like Pézenas is the most reliable recommendation available. The menu changes daily and is written on a blackboard — in summer that means whatever the market turned up that morning, in winter it means hearty regional cooking that earns its price. The terrace under the chestnut trees is the place to be on warm afternoons.
Do not expect great ceremony: this is not a restaurant that dwells on presentation. What you get is honest Languedoc cooking at sensible prices, served without fuss to a room that includes as many people who live here as people who are passing through. Come for lunch rather than dinner; this is a midday place by instinct and by clientele.