Serves8 to 10
                    
                
                
                    
                        
                            - Active time:30 min
 
                        
                            - Start to finish:1 1/2 hr
 
                        
                    
                
             
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              November 2003
            
          
          
      
  
                
                
            
            
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            2
                                            lb
                                            parsnips, peeled and cut into 1-inch pieces
                                            
                                        
 
                                    
                                        - 
                                            2
                                            lb
                                            russet (baking) potatoes, peeled and cut into 2-inch pieces
                                            
                                        
 
                                    
                                        - 
                                            1 tablespoon plus 1/2
                                            teaspoon
                                            salt
                                            
                                        
 
                                    
                                        - 
                                            1
                                            cup
                                            heavy cream
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            
                                            stick (1/4 cup) unsalted butter
                                            
                                        
 
                                    
                                        - 
                                            1/4
                                            teaspoon
                                            black pepper
                                            
                                        
 
                                    
                                
                            
                         
                    
                 
            
            
            
            
            
                
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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Cover parsnips and potatoes with cold water by 1 inch in a 6- to 8-quart pot, then add 1tablespoon salt and bring to a boil, partially covered. Reduce heat and simmer vegetables, partially covered, until very tender but not falling apart, 30 to 40 minutes.
                                         
                                    
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Meanwhile, bring cream, butter, pepper, and remaining 1/2 teaspoon salt to a simmer in 4-quart heavy pot over moderate heat.
                                         
                                    
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Drain vegetables in a colander. Force warm vegetables through ricer into cream mixture, then stir to combine well.
                                         
                                    
                                
                             
                        
                    
                    Cooks’ note: Potato parsnip purée can be made 1 day ahead and chilled in a baking dish, covered. Bring to room temperature and reheat, covered, in a preheated 450°F oven until hot, about 20 minutes, or in a microwave.