This is my take on the classic Pan Bagnat with step-by-step photos of how I assembled it, as shown in the recipe; this wonderfully sumptuous French Picnic Sandwich can be made WELL in advance, in fact the night before is best.
I found this delicious appetizer on another recipe site as I was looking for a way to use up the abundance of anaheim peppers I have growing in my garden.
For a light entree on a summer night, this dish is just the ticket. Salting and draining the zucchini and tomatoes before baking prevents them from releasing excess moisture as they bake, so the gratin stays firm, not soggy.