For a richer flavor, roast the sweet potatoes before mashing. Roasting brings out their natural sweetness and adds a delightful caramelized note to the soup. Feel free to experiment with different spices! A pinch of cinnamon, nutmeg, or smoked paprika can add intriguing layers of flavor to your Vegan Sweet Potato Soup. If you prefer a smoother texture, use an immersion blender to puree the soup after cooking. Be cautious when blending hot liquids! This soup freezes well, making it a perfect make-ahead meal for busy weeknights. Simply thaw overnight and reheat gently on the stovetop.