Preheat oven to 400°F (200°C). Halve butternut squash, remove seeds, drizzle with 1 tbsp olive oil, salt, and pepper.
Roast cut-side up for 40-50 min, until tender.
Sauté onion in a pot with 1 tbsp olive oil for 5 min. Add garlic, cook 1 min.
Scoop out roasted squash flesh, add to the pot.
Pour in broth, simmer for 15 min.
Blend until smooth with immersion blender (or in batches in regular blender).
Stir in cream, nutmeg, cinnamon, ginger, and maple syrup (optional); season with salt and pepper.
Taste and adjust seasonings. Serve hot!