How to Make It
Heat oil in a Dutch oven over medium heat. Add onion and 1/2 teaspoon salt and cook, stirring occasionally, until onion is tender, about 6 minutes. Stir in ginger; sauté until fragrant, about 1 minute. Add pears and cashews; cook, stirring often, until pears have softened, about 2 minutes.
Sprinkle in curry powder, turmeric, cumin, and chili powder; cook until fragrant and spices are beginning to toast, about 1 minute. Whisk in pumpkin and 3 cups broth. Increase heat to medium-high and bring to a boil. Reduce heat to medium-low; simmer for 30 minutes.
Working in batches, transfer soup to a high-speed blender. Remove center piece of blender lid to allow steam to escape; secure lid on blender and place a clean towel over opening in lid. Process until smooth, about 10 seconds. Return soup to Dutch oven over medium-low heat; stir in 2 cups broth and remaining 1/2 teaspoon salt. (Stir in up to 1/2 cup additional broth, if needed, to reach desired consistency.) If desired, garnish servings with pepper and coconut yogurt.