Many thanks for your helpful replies. It sounds as though it's worth trying. I should have mentioned I am already vegan, so that does make me very aware of my protein intake. (Irish, I use applesauce in cake recipes too). I'm not celiac or diabetic.
This is going to be difficult, as I love pasta, bread and biscuits. and my lunches at present always include two slices of bread. As AnneNeville says, quick snacks usually seem to contain gluten. I'll see what I can do.