Roasted Beet and Potato Soup
I adapted this from a vegetarian soup while my twin toddlers were going through a soup-only phase. They love it. Luckily the rest of the family enjoys it too! It's a nice hearty puree, super-easy to put together, especially if you roast the potatoes and beets beforehand.
This also works with buttermilk in place of whole milk, or you could substitute skim if you wanted to cut the fat.