Yesterday, I was on a nine-hour flight from Mexico City to Madrid. I had made a reservation for a vegan meal but ended up with only three small bread rolls. No, this wasn't the airline's vegan meal option... A few months ago, I booked a flight and immediately made a reservation for a plant-based meal. It’s one of the things you learn early on if you’re following any special diet. Fast forward to the day of my flight: In the morning, I received an email informing me that my flight ha...