Butternut squash soup

Ingredients: 1 large butternut squash, peeled, seeded, and cubed 2 tablespoons olive oil 1 large onion, chopped 3 cloves garlic, minced 4 cups vegetable broth 1 cup coconut milk (or heavy cream for a richer soup) 1 teaspoon ground nutmeg 1 teaspoon ground cinnamon Salt and pepper to taste Fresh parsley or chives for garnish (optional)