The Fougasse Farcie is a Provençal flatbread that has been split and filled, and the bread is the entire argument. A fougasse is an olive-oil dough slashed into the ladder-and-leaf shape that gives it more crust than crumb: the cuts open in the oven, the edges go crisp and chewy, and the interior stays just dense enough to hold together. To make it a sandwich you cut one of these flat loaves through its thickness and pack the cavity, which means the filling is bounded by two faces of an oil-rich, herb-flecked bread rather than by neutral white slices.
That construction sets the rules for what goes inside. The fougasse is already seasoned, often with olives baked into the dough, sometimes with herbs, sometimes with a wash of oil and coarse salt on the crust, so the filling does not need to carry the whole sandwich. A few intensely flavored components do the work: cured anchovy, tapenade, soft cheese, slow-cooked onion, roasted vegetables in oil. The oil in the crumb is the binding agent the way butter is the binding agent in a baguette sandwich, and it pulls the filling and the bread into one thing rather than a stack. Because the bread is flat and firm rather than tall and airy, the sandwich travels well by hand, eaten in pieces along the slashed openings, and it holds its texture longer than a soft roll would once the filling has been added.
This is Provence's flatbread sandwich, and it sits in the same regional family as the other southern bread snacks built on a dough base rather than a crumb: the same logic of letting a handful of strong ingredients sit on or inside a well-baked flat bread and eating the result by hand, between meals, off paper. The variations are mostly a matter of what fills the split: tapenade and goat cheese in one bakery, anchovy and onion in the next, roasted peppers in oil when the summer produce is loud enough to carry it alone. Those neighbors of the form are gathered under Pissaladière & Niçois Bread Snacks, where the Provençal bread-snack tradition is treated as one category, and the Fougasse Farcie is its split-and-stuffed member.