Serves10
                    
                
                
                    
                        
                            - Active Time:20 min
- Start to Finish:2 hr
 
            
                
                    
                    Here is an almost effortless soup that will taste even better the day after it's made.
                
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              January 2007
            
          
          
      
  
                
                
            
            
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            1
                                            pound
                                            French green lentils (about 2 1/2 cups), picked over and rinsed
                                            
                                        
- 
                                            10
                                            oz
                                            mushrooms, chopped (about 4 cups)
                                            
                                        
- 
                                            3
                                            
                                            medium onions, coarsely chopped
                                            
                                        
- 
                                            1
                                            cup
                                            chopped carrot
                                            
                                        
- 
                                            1
                                            cup
                                            chopped celery
                                            
                                        
- 
                                            1
                                            
                                            (3- to 4-inch) cinnamon stick
                                            
                                        
- 
                                            1
                                            
                                            Turkish or California bay leaf
                                            
                                        
- 
                                            3 1/2 
                                            cups
                                            reduced-sodium beef broth (28 fl oz)
                                            
                                        
- 
                                            2
                                            quarts
                                            water
                                            
                                        
- 
                                            1
                                            teaspoon
                                            salt
                                            
                                        
- 
                                            1/2
                                            teaspoon
                                            black pepper
                                            
                                        
- 
                                            3 1/2
                                            oz
                                            Spanish chorizo (cured spiced pork sausage), casing removed and sausage thinly sliced (1 cup)
                                            
                                        
 
                    
                 
            
            
            
            
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
                                        - 
                                            
                                            Simmer all ingredients except chorizo in a 6- to 8-quart heavy pot, partially covered, stirring occasionally, 1 1/2 hours. Discard cinnamon stick and bay leaf, then stir in chorizo and gently simmer 5 minutes to allow flavors to blend. 
 
                        
                    
                    Cooks' note: Soup can be made 4 days ahead and cooled completely, uncovered, then chilled, covered.