Preheat oven to 350 degrees F. Place the bread slices in a large bowl and pour milk over them. Allow it to soak in for several minutes.
Place the ground beef, ground pork, milk-soaked bread, Parmesan, onion, bell pepper, seasoned salt, salt, black pepper, and parsley in a large mixing bowl. Pour in beaten eggs. With clean hands, mix the ingredients until well combined.
Form the mixture into a loaf shape on a broiler pan, which will allow the fat to drain. (Line the bottom of the pan with foil to avoid a big mess!)
Make the sauce: add ketchup, brown sugar, mustard, and hot sauce in a mixing bowl. Stir together. Pour ⅓ of the mixture over the uncooked meatloaf. Spread with a spoon.
Bake for 45 minutes, then pour another ⅓ of the sauce over the top.
Bake for another 15 minutes. Slice and serve with remaining sauce. Serve with mashed potatoes and chopped broccoli for a complete meal.