Definition of à la roi in English:
à la roi
(also a la roi)
adjective ˌa lə ˈrwɑːˌɑː lɑː ˈrwɑːˌa la ˈrwɑː
Cookery rare As postpositive in the names of various dishes: in the style or manner of the king.
Origin
Mid 19th century. From à la + French roi roy. Compare earlier à la reine, à la royale.