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              Prepare the filling: fry the potatoes in heated vegetable oil for several minutes. Add onion, garlic and fry for 3 minutes.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Add the minced meat in small portions and fry it until golden brown. Salt, pepper and add butter.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Prepare the base: beat eggs and sugar until smooth. Add kefir, vegetable oil and mix well.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Pour the resulting mass into the flour sifted with baking powder and salt. Beat well with a whisk until smooth.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Place the filling on the bottom of the pan and pour the dough over it, spreading it evenly.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Bake in an oven preheated to 180°C for 30 minutes.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Cut the finished pie into portions and serve.