01 - Set the oven to 425°F.
02 - Combine the butternut squash, carrots, onion, and garlic with 2 tablespoons of olive oil, salt, and pepper. Spread evenly on a baking sheet.
03 - Roast the vegetables for 30 to 35 minutes, turning once halfway through, until they are tender and golden brown.
04 - While vegetables roast, heat the remaining 1 tablespoon of olive oil in a small skillet over medium-high heat. Fry the sage leaves for 30 to 45 seconds until crisp. Transfer to paper towels to drain.
05 - Transfer the roasted vegetables to a large pot. Add vegetable broth and ground nutmeg. Bring to a gentle simmer over medium heat and cook for 5 minutes.
06 - Using an immersion blender or by transferring in batches to a blender, puree the soup until completely smooth.
07 - Stir in coconut milk or heavy cream. Warm gently and adjust seasoning with salt and pepper to taste.
08 - Ladle the soup into bowls and garnish with crispy sage leaves before serving.