Serves8
                    
                
                
                    
                        
                            - Active time:30 min
- Start to finish:30 min
 
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              October 2002
            
          
          
      
  
                
                
            
            
            
                If you can't get cotija cheese, you can substitute feta—it's stronger in flavor and a bit saltier than cotija, but it works fine. Archibald also makes a version of this salad topped with shavings of Manchego cheese.
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            2 to 3
                                            cups
                                            vegetable oil for frying
                                            
                                        
- 
                                            4
                                            
                                            (6- to 7-inch) corn tortillas, halved and cut crosswise into 1/4-inch strips
                                            
                                        
- 
                                            1
                                            tablespoon
                                            Sherry vinegar
                                            
                                        
- 
                                            1/4
                                            teaspoon
                                            salt
                                            
                                        
- 
                                            1/4
                                            teaspoon
                                            black pepper
                                            
                                        
- 
                                            3
                                            tablespoons
                                            olive oil
                                            
                                        
- 
                                            1
                                            lb
                                            watercress, coarse stems discarded
                                            
                                        
- 
                                            1
                                            pint
                                            cherry tomatoes (preferably heirloom), halved
                                            
                                        
- 
                                            4
                                            oz
                                            
                                            cotija cheese (also called añejo), crumbled (1 cup)
                                        
 
                    
                 
            
            
            
            
            
                
                    
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                                Special Equipment:a deep-fat thermometer 
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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                                            Heat 1 inch of vegetable oil in a 10- to 12-inch heavy skillet until thermometer registers 350ºF, then fry tortilla strips, a handful at a time, until golden, 30 to 45 seconds. Transfer with a slotted spoon to paper towels to drain and season with salt. 
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                                            Whisk together vinegar, salt, and pepper in a small bowl, then add olive oil in a stream, whisking until combined well. 
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                                            Toss watercress with dressing in a large bowl and divide among 8 plates. Divide tomatoes and tortilla strips among salads, tucking strips into greens decoratively, and sprinkle salads with cheese.