You can definitely use broccoli stems in soup! They add nutrients and flavour to the broth. Here's how to prepare them:   Trim the ends: Cut off the woody end of the broccoli stem.   Peel (optional): For a smoother texture, you can peel off the tough outer layer of the stem with a vegetable peeler. This step is optional, but it can be helpful if the stems are particularly thick.   Chop or grate: Cut the broccoli stem into small pieces or grate it for a more even distribution in the soup.