01 - 
                Heat the oven to 190°C to ensure even toasting of the bread.
              
              
              
                02 - 
                In a large skillet over medium heat, cook chopped onion and minced garlic for 2 to 3 minutes until softened and fragrant, stirring frequently.
              
              
              
                03 - 
                Add ground beef or turkey to the skillet, breaking it up with a wooden spoon. Cook while stirring until no pink remains. Drain excess fat to maintain flavor without greasiness.
              
              
              
                04 - 
                Incorporate ketchup, tomato paste, Worcestershire sauce, yellow mustard, salt, and freshly ground black pepper. Reduce heat and simmer gently for 5 to 7 minutes until the mixture thickens and flavors meld, stirring occasionally.
              
              
              
                05 - 
                Combine softened butter, minced garlic, chopped parsley, and a pinch of salt in a bowl. Mash and mix thoroughly until well blended and speckled with green.
              
              
              
                06 - 
                Spread a generous layer of garlic butter on the cut sides of the bread. Arrange on a baking tray, cut side up, and toast in the oven for 5 to 7 minutes until edges turn golden and aromatic.
              
              
              
                07 - 
                Spoon the meat mixture evenly onto the toasted bread halves. Evenly sprinkle shredded mozzarella and cheddar cheese over the filling, ensuring coverage extends to the edges.
              
              
              
                08 - 
                Return the tray to the oven and bake for 5 to 7 minutes until cheese is melted, bubbly, and lightly golden.
              
              
              
                09 - 
                Slice and serve immediately while hot. Suggested accompaniments include fresh salad, fries, or pickles.