1. Preheat oven to 450°.
2. Line a rimmed baking sheet with parchment paper. Place squash in a bowl, and drizzle with 1 tablespoon oil. Sprinkle with 1/4 teaspoon salt, and toss. Bake at 450° for 35 minutes or until golden and tender.
3. Heat the remaining 1 teaspoon oil in a large saucepan over medium heat; swirl to coat. Add onion; cook 5 minutes, stirring occasionally. Add squash mixture, stock, and curry paste. Sprinkle with the remaining 1/2 teaspoon salt, and bring to a boil. Reduce heat, and simmer for 15 minutes, stirring occasionally. Remove from heat; stir in lime juice and coconut milk. Let stand for 15 minutes.
4. Place half of squash mixture in a blender, and blend until smooth. Pour soup into a bowl. Repeat. Divide the soup evenly among 8 bowls, and top evenly with cilantro, coconut, and chile slices.