"Ce mănânci în post?"

Translation: What do you eat during fasting?

[RobBeckett]

The English would be much better translated as: "What do you eat during the fast?" or "What do you eat while fasting?".
"...while the fast?" is not correct.

[Coriander18]

I had a chuckle to myself about eating the post.... anyone for rice paper and edible ink!