There are no French food names starting with W, but there are imported foreign names used in French, such as the Waldorf salad, the Wapiti deer from Canada, the Washington garnish, the Waterfish sauce, the Waterzoï Flemish stew with fish and vegetable or its Belgian version with chicken, the Welsh rarebit, Whisky (if that's a food) and the Worcester sauce.
French dressing
French toast
French fries
French bread
French Vanilla Ice Cream
concombre, curry, cumin, carotte, crouton, cookie, ciboulette ...
quechie
French Dressing
Carré d'agneau, caramel, citrouille, cerise, croissant all start with a C.
carrefour
Camembert
Canada, Congo
Calais
Horse
Cereal.
citroen
Corsica and Clipperton Island .
aac
cream
corn