(enough for 16, you may need to cut in half) :
Sauté onion and celery in butter, in an 8 qt soup pot until soft.
Add carrots, potatoes and seasoning. Cover mixture with milk until ingredients are covered.
Bring to simmering point and cook for 1 hour. Meanwhile in blender dissolve flour in 2 bottles of clam juice. When vegetables are tender add clam juice/flour mixture to pot.
Soup will temporarily become thick. Add sour cream and heavy cream, stir thoroughly.
Add complete contents of cans of clams, 15 minutes before serving, so clams do not become tough.
Garnish with parsley and crumbed bacon. Optional, addition of 1 cup of white wine with vegetables at beginning. Increase flour to maintain thickness. Quantities are not critical, Sanna changes it everytime she makes it, depending on how many aperitifs she has on the way.
Recipe from Sanna Say GA