Tips on cooking for people with different allergies Most people have friends with allergies, and I wish to make a list with tips on how to make such a meal when there is different allergies at the same time. For example, it's a big problem making a cake without gluten, laktose and eggs, but this issue might come at hand. Often one don't wish to make three different cakes, so tips one how to assert this problem is that I wan't from this thread. Will also try to summarize the tips in this post.

Tips for intollerance, religion and personal choices are also welcome. Actually tips for cooking for everyone of us who tend to be a pain in the ass (I have celiaki myself, so not offence intended).


Make a list of can have ingredients for the possible courses.
Use substitute products (Not easy since they might behave a bit differently).
Make buffet where one have several gluten/laktose/egg/... free dishes (Can be a lot of work).


For tips on specific allergies, see: Fruit/nuts, Gluten

EDIT: I have specified the question quite a lot from the original by request from Ocaasi, since it started quite broad. The original question is removed. 

Also, is there some food that everyone can eat, or food where it is easy to use other ingredients to avoid allergic reactions? Making buffets are always a possibility, but I'm thinking more in the lines of three course meals without making to much differences on the dish.
A few basics which haven't been mentioned:


Find out what people's allergies are before they come (they should tell you, but better to ask)
Make labels which list food ingredients and put them on your buffet.
Bring an epi-pen.