Make Sopa de Abóbora e Coco - Coconut Butternut Squash Soup

Name: Make Sopa de Abóbora e Coco - Coconut Butternut Squash Soup
Cuisine: American, Latin American
Ingredients: 1 medium butternut squash; 2 tablespoons vegetable oil; 2 tablespoons butter; 1 onion; 1 large sweet potato; 1 tablespoon light brown sugar; 1 teaspoon cumin; 1 teaspoon chile pepper (or 1 tablespoon fresh minced chile pepper); 1/4 teaspoon cinnamon; 4 cups chicken stock; 1 cup coconut milk; Juice of 1 lime; 2 cups spinach leaves; Salt and pepper to taste; Garnish: toasted seeds