Question:
What’s the law about cooking with non mevushal wine if a gentile is around ?
CAN he handle the food that has wine in it ?
Or it’s only when in a bottle and cup but once mixed in food , you can’t offer it anymore to idols so no problem?
Answer:
Once the wine has already been mixed into food (and not sitting on top of it) yayin nesech will not apply to it.
Best Wishes
Sources:
Shulchan Aruch Y:D 123-5