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Explanation: How about this? It comes from the phrase "done to a turn" and means "cooked just right". It was traditionally used for meat, but I think it would work well here.
It's an old-fashioned saying that is still in use and so perhaps it would give the idea of tradition as well...
See google for 2000-odd hits and example below:
And make sure the under part is baked to a turn, so that it's all soaked in juice, so well done that the whole of it