→ Main Ingredients
                    
                      
                        01 - 
                        12 ounces top round beef, thinly sliced
                      
                    
                      
                        02 - 
                        Kosher salt, to taste
                      
                    
                      
                        03 - 
                        Freshly ground black pepper, to taste
                      
                    
                      
                        04 - 
                        2 tablespoons peanut oil, divided
                      
                    
                      
                        05 - 
                        1 tablespoon soy sauce
                      
                    
                      
                        06 - 
                        1 tablespoon rice wine vinegar
                      
                    
                      
                        07 - 
                        1½ teaspoons crushed red-pepper flakes
                      
                    
                      
                        08 - 
                        1 red bell pepper, thinly sliced
                      
                    
                      
                        09 - 
                        1 yellow bell pepper, thinly sliced
                      
                    
                      
                        10 - 
                        1 green bell pepper, thinly sliced
                      
                    
                      
                        11 - 
                        1 orange bell pepper, thinly sliced
                      
                    
                      
                        12 - 
                        3 garlic cloves, minced
                      
                    
                      
                        13 - 
                        1 bunch scallions, thinly sliced
                      
                    
                      
                        14 - 
                        Sesame seeds, as needed for finishing