be cooked to a turn -> ψημένο τέλεια, μαγειρεμένο τέλεια, λουκούμι, καλοψημένο, καλομαγειρεμένο, μαγειρεμένο άψογα, ψημένο όσο πρέπει, να γλύφεις τα δάχτυλά σου

[dominotheory]

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be cooked to a turn -> ψημένο τέλεια, μαγειρεμένο τέλεια, λουκούμι, καλοψημένο, καλομαγειρεμένο

be cooked/done to a turn
to be cooked for exactly the right amount of time The beef was done to a turn.
http://idioms.thefreedictionary.com/be+done+to+a+turn

to a T
Also, to a turn. Perfectly, exactly right, as in The description fitted him to a T, or The roast was done to a turn. The first expression, dating from the late 1600s, may allude to the T-square, used for accurate drawing, but some think it refers to crossing one's T's. The variant alludes to meat being turned on a spit until it is cooked to the proper degree. The variant was first recorded in 1780.
http://www.answers.com/topic/to-a-t

λουκούμι
(μτφ.) για φαγητό ή φαγώσιμο πολύ νόστιμο, τρυφερό και καλομαγειρεμένο: Tο φαγητό / το κρέας είναι / έγινε ~.
http://www.greek-language.gr/greekLang/modern_greek/tools/lexica/triantafyllides/search.html?lq=%CE%BB%CE%BF%CF%85%CE%BA%CE%BF%CF%8D%CE%BC%CE%B9&dq=

[crystal]

μαγειρεμένο άψογα, ψημένο όσο πρέπει, να γλύφεις τα δάχτυλά σου