I used to have a rather eclectic diet. Over the last few years I've been gradually reintroducing foods, to the point that I can eat almost anything with no consequences. The one that still gets me is onions: a large amount of onions will still give me some trouble.
If you want to cook for me, feed me whatever you want. If you want to help me stay healthy, try to keep the saturated fat under 6 grams per meal.