plat du jour
used for saying that something or someone is very popular or fashionable at a particular time. Du jour is French for "of the day":
Food miles, or the distance an ingredient has to travel from field to plate, are the topic du jour.
Forget the beach — mountain resorts are the hot trend du jour.
Mains come with the house salad and the sides du jour.
I went for the savoury tart du jour (fig, caramelized onion, and blue cheese).
"Stakeholder" became the political word du jour.
A little place called the Black Iris seems to be London's florist du jour.
For her new album she has worked with several of the producers du jour.
Photographers crowded round to get a photograph of the couple du jour.

SMART Vocabulary: related words and phrases

Restaurants & cafes
all-you-can-eat
automat
bill of fare
bistro
blue plate
creperie
degustation
diner
drive-through
eatery
pizzeria
plat du jour
prix fixe
raw bar
refectory
tasting menu
tea room
teahouse
transport café
wait staff

You can also find related words, phrases, and synonyms in the topics:

Providing & serving meals
Modern & fashionable

du jour | American Dictionary

du jour
adjective[ only after n ]
us/də ˈʒʊər, du/
(of food in a restaurant) the particular type available today:
The soup du jour is tomato rice.