Simple but fantastic French beach hotels w good food

I will be dropping my wife and a couple of her friends off at a beach hotel somewhere between Barcelona and Monaco while I follow the Tour de France for a few days, and I’m looking for hotel/inn recommendations for her. Preferences are for small, simple, good food, walkable to other things. Doesn’t need to be right on the water but should be very nice if not. Quality but not fancy / trying too hard. Thanks!