Caramelized Onion and Mushroom Havarti Melt
                                
                                    1 h
                                
                        
                    
    Ingredients
| 
                                     
                                            
                                                Unsalted butter
                                            
                                     
                                 | 
                                2 tbsp | 
|---|---|
| 
                                     
                                            
                                                Olive oil
                                            
                                     
                                 | 
                                2 tbsp | 
| 
                                     
                                            
                                                Large onion, sliced
                                            
                                     
                                 | 
                                1 | 
| 
                                     
                                            
                                                Cremini button mushrooms, sliced
                                            
                                     
                                 | 
                                2 cups | 
| 
                                     
                                            
                                                Salt
                                            
                                     
                                 | 
                                1 tsp | 
| 
                                     
                                            
                                                Ground black pepper
                                            
                                     
                                 | 
                                1 tsp | 
| 
                                     
                                            
                                                Sourdough bread
                                            
                                     
                                 | 
                                4 slices | 
| 
                                     
                                            
                                                Havarti cheese
                                            
                                     
                                 | 
                                8 slices | 
Instructions