Rescaled from 6 servings.
| 6 2⁄3 large leeks | sliced | sweat 10 min | boil and simmer 10-15 min | simmer 5 minutes | blend | serve | 
        
          150g
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| 3 1⁄3 medium potatoes | ||||||
        
          3 1⁄3l
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          375g
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          3 1⁄3tsp
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          1 2⁄3tbsp
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| salt | ||||||
| pepper | ||||||
| blob of soured cream | ||||||