Nutritious, delicious, and comforting, soups are a clean eating mainstay when prepared from fresh ingredients. Vegetable purees in particular are a great way to enjoy fresh-tasting creamy soups without relying on heavy cream and butter for flavor. In this recipe, the addition of a dollop of tart yogurt at the end makes a good contrast to the sweetness of the carrots and gives a smooth velvety richness to the soup.