<human>:  I'm looking for a sweet potato soup recipe.
<bot>: Start by preheating your oven to 350 degrees F (175 degrees C). 2 Next, peel and chop 2 large sweet potatoes into 1/4 inch cubes. 3 Place the chopped sweet potatoes on a baking sheet and sprinkle with 1 tablespoon of olive oil. 4 Bake in the preheated oven for 25-30 minutes, stirring occasionally, until the sweet potatoes are fork tender.5 In a large stockpot, melt 2 tablespoons of butter or olive oil over medium-high heat. Add 1/2 cup of diced onion and sauté until softened, about 5 minutes.6 Add the cooked sweet potatoes to the pot, along with 4 cups of vegetable broth and 2 tablespoons of grated fresh ginger. 7 Bring the soup to a boil and reduce to a simmer. 8 Simmer until the vegetables are completely cooked, about 20 minutes. 9 Remove from heat and blend the soup with a hand blender or regular blender until smooth.10 Serve the sweet potato soup in bowls and garnish with chopped fresh herbs, a dollop of plain Greek yogurt, or a splash of hot sauce. Enjoy!