I've started hiding cabbage in everything. I mean, everything- whatever meal be it brekkie, lunch or dinner.
It doesn't taste of anything or affect the flavour of the meal, but it really bulks it out. Fills me up loads. I started substituting half of the amount of pasta I was cooking for white cabbage and other half never noticed! So then it made it's way into everything. Give it a go! (If you like cabbage)
I get like this sometimes, and other times I'm the complete opposite. I find saving my A&B choices for the evening is a great help, cos it means I can have a cheese toastie if I get hungry after dinner, and if I don't save the HE's I try to snack away on free foods, like you've done with your lamb shank! I have been known to boil eggs at almost midnight whilst having a hungry day..!! They're really filling though, boil them and keep them in your fridge for free snackage (not sure how long they keep, I've never had them in there long enough to find out )