Have you tried swede, cauliflower or celiriac mash instead of mashed potatoes? Bread is my downfall too, haven't got a Waitrose near by to try the livlight (low carb) bread, but I do like the Burgen soya & Linseed. Bought some Spelt bread in M&S last night to try, but at £1.30 for a small loaf if I am ok with it it will only be for an occasional treat! You could also try some of the rye breads, although they are alot heavier than a sliced white, you may find something that worls for you and you like the taste of.