On a damp, rainy day, nothing hits the spot quite like this sweet and spicy chipotle sweet potato soup. It tastes deceptively rich and creamy, despite the absence of butter or cream. Sweet potatoes pack tons of healthy vitamins and minerals into your meal, giving your skin and eyes a boost, and the capsaicin in the chipotle peppers will give your metabolism a kick. You can top off your finished soup with a bit of low-fat sour cream, a dollop of Vegenaise, or a swathe of cashew cream and some chopped cilantro. It keeps well and tastes even better the next day.