Tomorrow, go out for a walk at lunchtime and buy a banana and a box of strawberries (and if you can bear it, a small pot of plain yoghurt). Eat the banana, share the strawberries with your colleagues. Eat your share of the strawberries with the yoghurt.
You will be entitled to feel very pleased with yourself, as you'll have consumed far fewer calories, which will be absorbed even more slowly thanks to the yoghurt, got some exercise, and made your colleagues happy. And no boring carrot sticks!!!!
Well done for losing all that weight!