Pumpkin Soup with Toasted Walnuts Recipe | Say Mmm

Ingredients

• 2 tablespoons butter
• 2 medium leeks, white and pale green parts only, finely chopped
• 2 medium carrots, finely chopped
• 1 rib celery, finely chopped
• 2 garlic cloves, minced
• 3/4 teaspoon cumin
• 3/4 teaspoon coriander
• 1/4 teaspoon nutmeg
• 3 cups chicken broth, plus extra for thinning
• 1 - 15 ounce can pure pumpkin puree
• 1/3 cup maple syrup
• 1/2 cup half and half