The French city associated with pissaladière is Nice.
Pissaladière is a Provençal and Niçoise flatbread, often compared with pizza or an onion tart. Its defining topping is slowly cooked onions, traditionally accompanied by anchovies and black olives, especially the local olives of Nice. Some versions also use pissalat, a salty anchovy-based paste that helps explain the dish’s name.
Nice is the fair quiz answer because the dish is strongly identified with the city and its regional cuisine. However, its deeper history crosses the nearby Italian border: food historians connect it with Ligurian preparations such as piscialandrea, and the exact origin remains debated. That regional overlap reflects the shared culinary history of Provence and Liguria.
It is commonly confused with a conventional pizza because it uses a bread-like base, but pissaladière traditionally has no tomato sauce and is dominated by sweet onions, salty fish and olives.