Preheat oven to 350°F. Line a sheet pan with aluminum foil. Spray with olive oil spray.
Cut butternut squash in half and scoop out seeds. Lay cut side down on foil-lined sheet pan. Roast for 1 hour and 15 minutes or until squash is very tender.
Scoop cooked squash out of skins. Add cooked squash, coconut milk, and curry paste to blender. Blend until smooth.
Transfer soup to a medium pot and whisk in vegetable broth. Simmer on low heat for 30-45 minutes.
While soup is cooking, blend yogurt, cilantro, lime zest, and lime juice in mini food processor or blender.
Warm maple syrup with cayenne (optional).
Pour soup into 4 bowls. Drizzle maple syrup and yogurt sauce over soup. Top with cilantro, green onions, and roasted pepitas. Serve with lime wedges.
Optional: double the batch and freeze half for later!