Done To A Turn

From the Cut n Paste

" Done to a turn"，是烹饪的一句用语，用来形容食物煮得恰到好处。

Example

"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."

For me

During my study week , my friend cooked some nice nice food for me. 
ahlang: Thanks dear, it was done to a turn.
friend: you're welcome ^^