Serves8
                    
                
                
                    
                        
                            - Active time:35 min
 
                        
                            - Start to finish:1 hr
 
                        
                    
                
             
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              July 2000
            
          
          
      
  
                
                
            
            
            
                An easy but elegant tart—perfect for a weekend in the country. 
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            1
                                            
                                            frozen puff pastry sheet (from a 17 1/4-oz package), thawed 
                                            
                                        
 
                                    
                                        - 
                                            1
                                            
                                            large egg, lightly beaten
                                            
                                        
 
                                    
                                        - 
                                            1/4
                                            cup
                                            sugar
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            cup
                                            sour cream 
                                            
                                        
 
                                    
                                        - 
                                            1/3
                                            cup
                                            whipped cream cheese
                                            
                                        
 
                                    
                                        - 
                                            1
                                            teaspoon
                                            finely grated fresh lime zest
                                            
                                        
 
                                    
                                        - 
                                            2
                                            
                                            large mangoes, peeled
                                            
                                        
 
                                    
                                
                            
                         
                    
                 
            
            
            
            
            
                
            
            
            
            
                
                    
                    
                    
                        
                            
                                Prepare pastry:
                                
                                
                                    
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Preheat oven to 400°F.
                                         
                                    
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Unfold pastry sheet on a greased baking sheet, then turn over (to prevent creases from splitting during baking). Trim edges with a sharp knife. Brush pastry lightly with egg (do not allow to drip down sides). Create a 3/4-inch border all around by lightly scoring a line parallel to each edge of pastry (do not cut all the way through). Prick inner rectangle evenly with a fork, then sprinkle with 1 tablespoon sugar.
                                         
                                    
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Bake in lower third of oven 15 minutes, or until puffed and golden brown. Transfer to a rack and cool to room temperature.
                                         
                                    
                                
                             
                        
                            
                                Make cream and cut mangoes while pastry bakes and cools:
                                
                                
                                    
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Whisk together sour cream, cream cheese, remaining 3 tablespoons sugar, and zest.
                                         
                                    
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Thinly slice mangoes lengthwise with a mandoline or other manual slicer or a sharp knife (be careful because peeled mango is slippery), then halve wide slices lengthwise.
                                         
                                    
                                
                             
                        
                            
                        
                    
                    Cooks’ note: Trimming edges of pastry dough allows layers to separate so pastry rises evenly.