01 -
Preheat oven to 190°C. Slice the Italian bread in half lengthwise. Spread softened butter evenly across cut sides and sprinkle with garlic salt.
02 -
Arrange bread halves on a baking sheet and bake for 10 minutes until lightly golden and crisp. Remove from the oven and set aside.
03 -
In a large skillet over medium heat, cook ground beef and chopped onion until beef is browned and onions are softened, breaking up meat as it cooks.
04 -
Drain excess fat. Stir in garlic powder, yellow mustard, ketchup, kosher salt, black pepper, and water. Simmer for 5 minutes until mixture thickens.
05 -
Spoon the hot beef mixture evenly over both toasted bread halves.
06 -
Sprinkle shredded mozzarella and cheddar cheese over the beef mixture.
07 -
Return the assembled bread to the oven. Bake for 5 to 7 minutes, until cheese is melted and bubbly.
08 -
Remove from oven, garnish with chopped fresh parsley, and cut into individual servings.