The inspiration for this recipes was Pan Bagnat, the traditional Nice “sandwich,” in which the top of a round loaf would be sliced off and some of the crumb hollowed out, mixed with tuna, olives, anchovies, etc. then spooned back in and the “lid” put on top. Later variations are often made with ham and cheese, and sometimes peppers layered up neatly inside the bread “shell,” but I thought it would be fun to stuff the ingredients between the slices of a whole loaf, and bake it. We often make this for lunch. and everyone loves it warm, but it is also a great picnic showstopper. You can carry it with you, still in its foil, then just open it up, drizzle with oil and let everyone help themselves. Although I have suggested using prosciutto and mozzarella, which melts very well, I always associate pain surprise with Provence, as I like to make it when I am there on holiday with the family, but using local cured ham and cheese instead.