I am no stranger to adjusting my cooking to avoid certain allergens. Milk protein, chickpeas, sesame, peas and nuts can all cause problems for various members of my family, potentially turning a nice meal into a panicked whirlwind of swelling, hives, wheezing and syringes of anti-histamine. However, when I needed to cook a meal suitable for someone with sulphite intolerance, I found I was completely unprepared. It seems there are sulphites in practically everything!