Created by MsPia on July 22, 2014
Step 1: Heat a large heavy pot or Dutch oven over high heat. Add oil and heat until hot. Add scallions, garlic, ginger, cinnamon sticks, chili paste and aniseed; stir-fry until fragrant, about 15 seconds.
Step 2: Add soy sauce rice wine and sugar. Pour in 5 cups of water and bring to a boil. Add lamb and return to a boil. Reduce the heat to low, partially cover, and simmer until the lamb is just tender, about 1 hour.
Step 3: Add sweet potatoes and continue to cook, partially cover, until they are tender, about 20 minutes. Discard the ginger and cinnamon sticks.
Step 4: Lightly mix in spinach. Cover and cooked until spinach has wilted, about 1 1/2 minutes. Ladle into soup plates and serve.