"A beautiful thick soup with bright orange colour and a hint of exotic spice. Perfect for autumn! Serve with a spoonful of plain yogurt and a sprig of fresh coriander for garnish."
1Melt the butter in a large saucepan over medium-high heat. Stir in onions, and cook until golden brown, 5 to 7 minutes. Season with cardamom, turmeric, ginger, pepper flakes, cinnamon, cayenne; cook until fragrant, about 1 minute.
2Pour in chicken broth and water; add sweet potatoes and carrots. Bring to a boil over high heat, then reduce heat to medium-low, cover, and simmer until the vegetables are tender, 25 to 30 minutes. Remove from heat, and puree in batches until smooth.