Step 1
Start by heating some oil in a big pot over medium heat. Toss in the onions and cook them, stirring now and then, until they soften and become translucent—this usually takes about 5 minutes. Next, add the curry powder, cumin, turmeric, and coriander. If things start sticking to the bottom, splash in a little water to keep everything moving. Pour in the vegetable broth, then add the sweet potatoes, white potatoes, and chickpeas. Bring the mixture up to a boil, then lower the heat and let it simmer until the potatoes are tender enough to blend, which should take around 20 minutes. Use an immersion blender to puree the soup to your liking. Finally, taste and season with salt and pepper before serving.



