Examples are provided aplenty, from chef Gordon Ramsay:
Fry. Roast. Drizzle. Done.
Drizzle olive into the sauce circling the fish. Done.
But you also see the term used on buttons in computers and mobile devices - presumably used as a contraction of I'm done or You're done and frequently displayed as an alternative to Close.
But what kind of phrase or grammatical formation would be correct to refer to this usage of the word 'done' as a standalone word. Is it even 'correct' usage, let alone perhaps not even being 'proper' usage?