Serves8
                    
                
                
                    
                        
                            - Active time:30 min
 
                        
                            - Start to finish:3 1/2 hr
 
                        
                    
                
             
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              November 2008
            
          
          
      
  
                
                
            
            
            
                Before the storm of desserts comes the palate-cleansing calm. This playful, snowy mound of savory celery with hints of green apple and tarragon refreshes after the preceding spread. Counterintuitive as it may seem, taking a break before dessertto eat a pre-dessertwill help you enjoy the sweet abundance that awaits.
Learn the story behind the Over the Top Thanksgiving menu in our series The Recipe.
 
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
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                                            1
                                            
                                            (1,000-mg) tablet vitamin C (ascorbic acid)
                                            
                                        
 
                                    
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                                            2
                                            
                                            Granny Smith apples, very coarsely chopped
                                            
                                        
 
                                    
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                                            2/3
                                            cup
                                            water, divided
                                            
                                        
 
                                    
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                                            1
                                            tablespoon
                                            chopped tarragon
                                            
                                        
 
                                    
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                                            4
                                            cups
                                            very coarsely chopped celery ribs (from 1 bunch)
                                            
                                        
 
                                    
                                
                            
                         
                    
                 
            
            
            
            
            
                
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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Crush vitamin C tablet in a bowl with back of a spoon, then line a sieve with dampened flour sack cloth and set over bowl.
                                         
                                    
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Purée apples with 1/3 cup water in a food processor (do not use a blender) until almost smooth, then pour into cloth. Bunch up cloth around mixture and squeeze as much clear juice as possible through cloth (about 1 1/2 cups). Discard solids remaining in cloth. Rinse and wring out cloth, then return to sieve.
                                         
                                    
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Purée tarragon with remaining 1/3 cup water in processor until water is deep green, then add celery and purée until almost smooth. Pour into lined sieve and squeeze out juices (about 1 1/2 cups) into bowl with apple juice. Stir in 1/2 teaspoon salt and 1/4 teaspoon pepper.
                                         
                                    
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Freeze mixture in an 8-inch square baking dish, scraping and stirring with a fork every 30 minutes, until frozen, at least 3 hours. (It will be too hard to scrape once fully frozen.)
                                         
                                    
                                
                             
                        
                    
                    Cooks’ note: Granita can be made 2 days ahead (cover once frozen). Let stand at room temperature about 10 minutes and re-scrape before serving.