Created by dienia b on November 6, 2021
Step 1: Melt butter in large saucepan.
Step 2: Add chopped onions and mix well.
Step 3: Add beef broth, celery leaves and potato.
Step 4: Bring to boil, cover and simmer 30 minutes.
Step 5: Puree mixture in blender (in batches if necessary), (be careful blending hot liquid, it expands) or use a stick blender.
Step 6: Return to saucepan and blend in wine, vinegar and sugar.
Step 7: Bring to boil and simmer five minutes.
Step 8: Stir in cream, parsley and salt and pepper to taste.
Step 9: Heat to serving temperature but do not boil.