to a turn
For exactly the right amount of time necessary or desired. (Used almost exclusively in reference to how well meat is cooked). My goodness, these steaks are so flavorful and have been cooked to a turn! Jeff is always the one manning the grill, because he makes sure everything on there is done to a turn!
to a turn
to exactly the right degree (used especially in relation to cooking). 1931 Good Housekeeping The meal began with a magnificent bass, broiled to a turn over heart-wood coals.