Today's tipp from the German Thermomix Site:
Alternative for Nuts in Nut Allergics
Instead of walnuts or almonds the nut allergic can use the same amount of ground oatmeal instead. They also have an nutty taste.
You can use whole oats and grind them in the TMX, or buy ready made. You can always use excess oatmeal for some good old Atholl Brose. D'ye ken?