i just have to throw a couple more ideas out there since food is a hobby of mine.
if anyone is trying the route of dairy/wheat free...try adding slivered almonds and capers to your tunafish and then rolling it up in a leaf of romaine lettuce instead of bread. it is sooooo yummy and you save by not eating so many carbs.
i actually use lettuce a lot as a replacement for bread. not iceberg though, as it has zero nutritional value.