Heat 1 tablespoon of the oil in a large Dutch oven over medium-high heat. Add the sweet potatoes and sauté for 3-5 minutes until lightly browned. Add the onion and the other tablespoon of oil and continue to cook for another 1-2 minutes until softened.
Sprinkle the garam masala, turmeric, cumin, and garlic powder over the vegetables and sauté for 30 seconds until fragrant. Add the vegetable broth and allow the mixture to come to a boil. Cover the pot, reduce the heat to low, and simmer 10 minutes or until the vegetables are tender.
Transfer the soup to a counter-top blender and puree, being careful not to let the steam blow the top off the blender.
Pour the coconut milk and salt into the blender and pulse until well combined. Taste and add salt as needed.
Enjoy!