This soup recipe just came out of my head while I was looking in my freezer at all the bags of cooked sweet potatoes I had stored there. I as so pleased with it that I had to share. :) I love toasting a piece of nutty oat bread and breaking it up and putting it in my soup for a little kick of texture and flavor.
In large 6-8 quart pot. Cook onion, celery and carrots and seasonings in 1 cup broth till tender and mushie, add more broth if needed.
Remove from heat add cooked sweet potato. Mix together, put approx. 2 cups at a time into blender to puree adding the broth and the milk at this time to help the puree process. Return pureed soup to pan and reheat. Add water to desired thickness and more spices if you would like to taste.
Remember spices can get stronger the longer they simmer.