[header] How to make sweet potato soup [title] Peel sweet potatoes and dice them to about an inch in size for faster cooking. [title] Peel and rough chop your onion. [title] Clean and cut up your celery to one inch pieces. 
[title] Do the same for your fennel if you have decided you'd like to incorporate it for a slightly more gourmet taste. [step] Add water to about one inch over the vegetables.