1. In a large pot, sauté the onions in butter and oil. 2. Add broth and lemon juice, bring to a boil. 3. Peel sweet potatoes and cut chunks directly into the pot, one at a time to avoid discolouration. 4. Reduce heat, simmer over medium/low heat for 20 minutes or until everything is tender. 5. Add black beans and pepper, cook for an additional 2 minutes. 6. Using a blender, puree the soup until smooth. 7. Serve hot, with a dollop of sour cream and sprinkle of parsley if desired.
|