I made this yesterday for a potluck lunch at Michael's work, and by the look of the empty tupperwear container, I think Michael's co-workers liked it! (overthehillandonaroll.com)
So the grains, roasted veg and hummus I prepare in advance and keep in tupperwears in the fridge but of course eating the same three things everyday would get boring so I then buy a variety of other veg to add in each morning. (deliciouslyella.com)
Keep it in a separate tupperwear / ziplock in the fridge, and portion it into the soup directly into the bowls when you're going to eat it, before you heat it up. (isachandra.com)