Hi 2Extra - if stock cubes raise eyebrows, try marigold Swiss Vegetable Bouillon Powder, comes in tubs, sell it at Waitrose, Holland & Barrett & most Health Food shops. Goes a long way, a handful of almonds does help too, providing it's a small handful i.e child size......... If you get starving eat one of those Babybel little round cheese things, as they are easy to have around at work & won't raise any eyebrows.
I tend to get hungry mid afternoon, so nibble as above & eat dinner early. I am lucky as I now work based from home, but would probably keel over if I had to wait until 7.30 for my main meal.
Can you take a thermos of more nourishing soup to work eg minestrone with some borlotti beans in it, without the pasta? I bulk cook soup & freeze it, if I haven't got the on-plan ingredients at home for whatever reason, we have soup for lunch one day ( add a little fat to your soup, i.e. cream, or blue cheese with cauli as examples, helps with hunger-pangs) and salad the next, stuffing red-peppers with feta & pomegranate seeds lasted all of 2 weeks, was quicker to make it into a salad......swiftly followed by smoked salmon & avocado salad, then chicken salad....