You can substitute pumpkin, carrots or any other root vegetable for the sweet potatoes in this recipe for a different flavor profile. For spice lovers: Finish the soup with chili oil for some heat. The furikake can be also be made with kale, chard or any other sturdy leafy greens in place of collards. Kick up the flavor of your furikake by adding in umami from mushroom powder or bonito flakes, or add black sesame seeds. Can’t find coconut vinegar? Apple cider vinegar works well.