Preparation In small saucepan, combine bacon and cold water to cover. Cover, bring to boil over moderate heat, and skim foam from surface. Reduce heat and simmer 7 minutes. Drain and cool, then cut into 1-inch chunks. Set aside. In 6-quart heavy stock pot over moderate heat, melt butter. Add onion and sauté, stirring, until softened, about 3 minutes. Add potatoes and sauté 2 minutes. Add stock, bay leaves, salt, and pepper and bring to boil. Reduce heat to moderately low, cover, and simmer until potatoes are soft, about 8 to 10 minutes. Add cabbage and simmer 5 additional minutes. Discard bay leaves. Working in 3 batches, in blender purée soup until smooth (using caution when blending hot liquids). Return to pot, stir in bacon, and rewarm if necessary. Ladle soup into bowls and serve.
Preparation In small saucepan, combine bacon and cold water to cover. Cover, bring to boil over moderate heat, and skim foam from surface. Reduce heat and simmer 7 minutes. Drain and cool, then cut into 1-inch chunks. Set aside. In 6-quart heavy stock pot over moderate heat, melt butter. Add onion and sauté, stirring, until softened, about 3 minutes. Add potatoes and sauté 2 minutes. Add stock, bay leaves, salt, and pepper and bring to boil. Reduce heat to moderately low, cover, and simmer until potatoes are soft, about 8 to 10 minutes. Add cabbage and simmer 5 additional minutes. Discard bay leaves. Working in 3 batches, in blender purée soup until smooth (using caution when blending hot liquids). Return to pot, stir in bacon, and rewarm if necessary. Ladle soup into bowls and serve.