But pitta bread is still bread! Wheat!
I used to make a sandwich out of ryvita, but you have to make it just before you eat it otherwise it goes all soggy and yuk. I tried rye bread but it's like eating a brick.
Alternatives i guess are about ideas other than sandwiches:-
sushi (yum)
rice salad
pasta salad
baked potatoes
I also went through a phase of eating cereal, fruit and yoghurt for lunch