→ Filling
                    
                      
                        01 - 
                        1/2 cup Parmesan cheese, freshly grated
                      
                    
                      
                        02 - 
                        1 cup soft ricotta cheese
                      
                    
                      
                        03 - 
                        1 cup mushrooms, cooked and finely diced
                      
                    
                      
                        04 - 
                        1 large egg, lightly whisked
                      
                    
                      
                        05 - 
                        1/2 tsp of black pepper
                      
                    
                      
                        06 - 
                        1 tsp garlic powder for seasoning
                      
                    
                      
                        07 - 
                        1/2 tsp salt, or to taste
                      
                    
                  
                    → Shells and Assembly
                    
                      
                        08 - 
                        2 cups Alfredo sauce, keep some aside for later
                      
                    
                      
                        09 - 
                        20 large pasta shells, cooked just right (al dente)
                      
                    
                      
                        10 - 
                        1/4 cup of mozzarella cheese, shredded