Like Pan Bagnat, which is basically a salade niçoise sandwich, canned tuna packed in olive oil is traditionally used. Many foods of French origin that we enjoy have been adapted to American tastes and water-packed canned tuna and fresh grilled tuna are usually what is used here. Don't be afraid to experiment with any of the components, especially the vegetables - this salad provides the perfect opportunity to create a beautiful and colorful presentation of seasonal produce.
Vinaigrette adapted from Simply Recipes