01 -
1 loaf Italian bread.
02 -
½ cup unsalted butter, softened.
03 -
1 teaspoon garlic salt.
04 -
1 pound ground beef.
05 -
¼ cup yellow onion, chopped.
06 -
½ teaspoon garlic powder.
07 -
1 teaspoon yellow mustard.
08 -
¾ cup ketchup.
09 -
½ teaspoon kosher salt.
10 -
¼ teaspoon black pepper.
11 -
½ cup water.
12 -
1 cup mozzarella cheese, shredded.
13 -
1 cup sharp cheddar cheese, shredded.
14 -
Parsley, chopped for garnish.