À la carte
On the menu, with each dish separately priced.
This is a French term, literally translated as 'according to the card' (the 'card' is the menu card). This applies to meals that are ordered in a restaurant as separate items, each with a specified price, as distinct from a 'table d'hôte' meal, which has a fixed inclusive price.
The date of the earliest French usage isn't known. In English the first citation is Joseph Sherer's Notes and Reflections During a Ramble in Germany, 1826:
"He will find comfortable apartments, civil attendance, excellent fare, à la carte, at any hour."
See also - other French phrases in English.