Nutty Sweet Potato Soup with Harissa and Spinach
Harissa is a smoky North African chili paste made from smoked chiles, olive oil, spices, and sometimes tomatoes. Heat and flavor vary from brand to brand. This recipe was made with a French-produced harissa with a mild heat and extra sweetness from tomatoes.
1. Heat oil in Dutch oven over medium-high heat. Add leeks, and sauté 5 to 7 minutes. Stir in tomato paste, peanut butter, harissa, garlic, turmeric, and cumin; cook 1 minute, stirring constantly. Add sweet potatoes, broth, and 1 1/2 cups water, and simmer over medium-low heat, partially covered, 20 to 25 minutes, or until sweet potatoes are tender.
2. Blend mixture with immersion blender, adding more water if soup is too thick. Bring soup back to a simmer, and stir in spinach leaves. Serve with lemon wedges.