Risk vs Reward
The best bits and pieces of stories most often come from the author's own life. It is perhaps a logical extension of the concept "Write what you know.". One thing that is not depicted very frequently is the mental process of someone with allergies going out to eat in a strange city. Every restaurant must be weighed by the old standby of risk and reward. What are the most common ingredients, what are the chances of cross contamination, how badly does the protagonist want to avoid the consequences of the allergy in question? All these questions and more could be presented as either dialogue or internal dialogue. Of course in this author's case, writing what I know, would mainly involve giving up and making a meal at home like usual...
Betty Adams is an up and coming author with a bent for science and Sci-fi.