roasted butternut squash soup

Ingredients
1 large butternut squash, peeled and cubed
2 tablespoons olive oil
Salt and pepper, to taste
1 large onion, chopped
2 cloves garlic, minced
1 teaspoon ground cinnamon
1/2 teaspoon ground nutmeg
1/2 teaspoon ground cumin (optional, for a slightly earthy flavor)
4 cups vegetable or chicken broth
1 cup coconut milk or heavy cream (optional, for creaminess)
Fresh herbs like thyme or rosemary for garnish (optional)
Instructions