In the afternoon, though, they all fry those breaded fish things in what we all hope is the third vat to the right ~ but sometimes they screw up and drop them into the french fries vats.
I know it every single time (within half an hour) if I eat frenchfries.
The prophylaxis here is to instruct the cooking staff, in Spanish, English and Farsi, HOW TO COOK THE FISH.
Then, don't buy the fish because the breading is a killer.
Thanks for the tip on the lactose. Didn't help me. Still don't have enough production of lactase to make a serious difference. However, yoghurt and saurkraut, with meals, works fine.