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              Start marinating the pork. Add onion cut into half rings to the plate with meat. Mash it in your hands to release the juice. Add spices, salt and mix everything thoroughly.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Add tomato paste and vegetable oil. Stir the resulting mass again, cover the dish with cling film and marinate in the refrigerator for 2 hours.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Prepare a baking sheet and place a sheet of foil on it. Remove the meat from the refrigerator and pour the remaining marinade at the bottom onto a sheet of foil.
              
              
 
              
      
     
              
              
               
              
                  
                   
                   
               
              Place the meat and onions on foil, form a pouch, connecting the edges of the foil at the top. Bake the meat for 30 minutes at 200°C. Then open the foil and bake the meat for another 30 minutes at 180 °C.