I live with a roommate who is allergic to all forms of dairy. Because we make “community” food/meals for everyone who lives at our house, we need to make accommodations for his allergy in all our meals. I had to re-learn how to make even the simplest meals so we didn’t trigger an allergic reaction.
Not many cookbooks or recipes allow for eating dairy-free; the chemistry and texture of many recipes and meals relies on how cheese, milk, and butter react. The best cookbook resource that fills this need is Go Dairy Free, which has important information on alternative recipes and substitutions which assist people who eat and make dairy-free meals.