Makesabout 1 cup
                    
                
                
                    
                        
                            - Active time:15 min
 
                        
                            - Start to finish:15 min
 
                        
                    
                
             
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              December 2008
            
          
          
      
  
                
                
            
            
            
                The peppery bite of arugula (left over from Arugula, Bacon, and Gruyère Bread Pudding) blends with walnuts, garlic, and olive oil into a pesto-like sauce with unlimited potential. We love using it as a topping for grilled steak or roasted fish. It’s equally delicious tossed with pasta or steamed vegetables. 
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            2
                                            
                                            garlic cloves
                                            
                                        
 
                                    
                                        - 
                                            1
                                            cup
                                            walnuts (3 1/2 oz), toasted (see Tips) and cooled
                                            
                                        
 
                                    
                                        - 
                                            3
                                            oz
                                            arugula (4 cups packed)
                                            
                                        
 
                                    
                                        - 
                                            1/4
                                            cup
                                            olive oil
                                            
                                        
 
                                    
                                        - 
                                            5
                                            tablespoons
                                            water
                                            
                                        
 
                                    
                                
                            
                         
                    
                 
            
            
            
            
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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With motor running, drop garlic into food processor and finely chop. Add walnuts and pulse until coarsely chopped. Add arugula and pulse until finely chopped. With motor running, add oil in a slow stream until mixture forms a paste, then add water and 1/4 tsp each of salt and pepper, blending until combined. Season with salt.
                                         
                                    
                                
                             
                        
                    
                    Cooks’ note: Sauce keeps, chilled, in an airtight container 1 week.