Spiced Sweet Potato Soup

Ingredients

• 2 pounds sweet potatoes (about 4 medium), peeled and chopped
• 1 large sweet onion, finely chopped
• 1 medium sweet red pepper, finely chopped
• 1-1/2 teaspoons curry powder
• 1 teaspoon sea salt
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon ground ginger
• 1/4 teaspoon ground allspice
• 1/4 teaspoon grated lemon zest
• 1/8 teaspoon coarsely ground pepper
• 6 cups reduced-sodium chicken broth
• Salted pumpkin seeds or pepitas, optional