The Panini Poulet is the pressed Italian-bread sandwich built around cooked chicken, and the chicken is what sets its problems and its character. The bread is the soft, faintly sweet pain à panini, split and filled, then clamped onto a ridged hot plate until it carries dark griddle bars and the inside turns soft. Inside is sliced or shredded cooked chicken, almost always with a melting cheese to bind it, often with a sauce: a swipe of pesto, a little crème fraîche, a tomato base, sometimes a curried or barbecue dressing depending on the counter.
Chicken behaves differently under the press than ham does, and the build accounts for it. Lean cooked chicken has very little fat of its own, so left plain it goes dry and stringy once it has been flattened and heated through a second time. The working versions carry it in something: melted cheese, a sauced base, or both, so the press drives moisture into the meat rather than out of it. That is why a panini poulet is rarely just chicken and bread, and why the sauce here is structural rather than decorative. The bread is enriched and takes color fast, so the outside is dark and the inside warm and pliable while the chicken stays held in its cheese or sauce. It comes off the plate very hot, stiffens if it waits, and is eaten standing within a minute or two. This is order-and-press counter food, assembled while you watch.
Variations are mostly arguments about the sauce. The pesto build leans Italian and herbal; the crème-fraîche-and-mushroom build leans richer and closer to a hot bistro plate; the tomato-and-mozzarella build pushes it toward the margherita end of the spectrum; spiced and curried dressings turn up at the higher-volume counters. The ham-and-cheese and tuna paninis are the other two staples and are handled in their own entries. The Panini Poulet belongs with the pressed and non-baguette breads the catalog groups under Pain Garni & Non-Baguette Breads, the shelf of French sandwiches not built on a baguette. Its specific contribution is a lesson in moisture management: a pressed sandwich whose lean protein only works because something wet is carrying it through the heat.