1-Getting Started with Preparation: First, melt 4 tablespoons of unsalted butter in a large pot over medium heat. Add 2 medium chopped yellow onions and cook until soft and translucent, approximately 10 minutes, without browning. This step helps build a solid flavor base for your carrot sweet potato soup.

2-Adding Flavors and Vegetables: Stir in 1 tablespoon of curry powder and cook for one more minute until fragrant. Next, add 1 pound of peeled and chopped carrots, 1 1/2 pounds of peeled and chopped sweet potatoes, 8 cups of chicken broth, and 1 3/4 teaspoons of salt, then bring to a boil.

Cover and simmer over low heat until the vegetables are tender, about 25 minutes. At this point, add 1 peeled and chopped tart yet sweet apple and 2 tablespoons of honey, then puree the soup using a stick blender until smooth and creamy. For safety, use a blender in batches, allowing steam to escape.

3-Finishing Touches: Season to taste with salt, pepper, and more honey if needed. Serve in bowls, optionally sprinkling extra curry powder on top. Remember, the soup thickens as it sits; thin with water if necessary. The total preparation time is about 50 minutes, with 15 minutes for prep and 35 minutes for cooking.