If you happen to be visiting Notre Dame or walking along the Seine, the Cafe Panis on Quai Montebello directly across from Notre Dame is marvelous. They have a fabulous club sandwich and incredible salads (such as chevre in pastry with country ham , cucumber, tomatoes ,served over lettuce and fried potatoes)
And while you are there do stop on the bridge and listen to the saxophonist. I enjoy him tremendously. From 'the Theme From Laura" , 'April in Paris" to "Quiet Nights On Quiet Shores", it is a marvelous experience..