Created by MsPia on February 15, 2015
Step 1: In a large heavy saucepan cook onion, celery, and garlic in oil over moderately low heat, stirring, until onion is softened.
Step 2: Add carrots, ginger root, red pepper flakes, and broth and simmer, covered, until carrots are very tender, about 45 minutes.
Step 3: Stir in remaining ingredients and, in a blender or food processor, puree mixture in batches (use caution when blending hot liquids).
Step 4: Return soup to pan and heat over low heat until hot, being careful not to let boil.
Step 5: Serve soup drizzled decoratively with sour cream mixture.