Also known as flan parisien a flan pâtissier is a crust, often pâte sucrée, filled with egg custard and baked. Many bakeries sell it by the slice; schoolchildren often have it for an afternoon gouter.
Flamusse aux pommes is a flan made in Burgundy with apples but without pastry. Fion is another, made in the Vendée.
Image by Strovichky