I chose China as a stop because it was the cheapest and I di not think it would be a problem. I also assumed that transfer means transfer and not immigration and then entering the airport again through security...

the food that are allowed are basically everything that does not cause you to cough, sneeze or get a lot of reflux. Also nothing that dries out the throat. Out of precaution this meant no spicy food, no acidic food or beverages, no coffee, chocolate, alcohol or green/black tea and avoid fatty foods if you tend to have reflux (acidic stomach)