| Preparation:
Heat oil and butter in a large heavy saucepan over medium-high heat until butter
melts. Add onion, and cook, stirring occasionally, 10 minutes or until tender and
almost caramelized. Add celery, and cook, stirring often, 10 more minutes. Add garlic,
and cook, stirring constantly, 30 seconds, being careful not to brown garlic.
Add peppers and next 4 ingredients, and cook, stirring often, about 2 minutes.
Add sweet potatoes, broth, and bay leaves; bring soup to a low boil. Reduce heat,
and simmer for about 40 minutes or until potatoes are tender. Stir in chicken, and
cook 2 more minutes. Skim any foam from the top of the soup while cooking, and discard.
Remove bay leaves, and discard. Divide soup evenly among individual bowls, and top
with cilantro and lime wedges. Serve immediately. Garnish, if desired.
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