Idiom of the day :- Done to a turn

Usage, examples and definition of the Idiom :-

Good grief, I’m done to a turn !’ Alex cried. The term Alex is using is one that is borrowed from cooking where meat is roasted over a fire. It refers to food that is cooked just right. ‘While you were sunbathing I had a wonderful dinner,’ Alex’s wife said. ‘Everything was done to a turn.’