Spicy Pumpkin Soup

Ingredients 4 Tbsp unsalted butter 2 medium yellow onions, chopped 2 teaspoons minced garlic 1/8 to 1/4 teaspoon crushed red pepper 2 teaspoons curry powder 1/2 teaspoon ground coriander Pinch ground cayenne pepper (optional) 3 (15 oz) cans 100 percent pumpkin or 6 cups of chopped roasted pumpkin 5 cups of chicken broth (or vegetable [...]