Preheat oven to 350°F (175°C).

Cut Italian bread on an angle almost to the bottom to create slices that remain connected.

Melt butter in a bowl.

Add parsley, garlic, salt, pepper, and Italian seasoning to the melted butter and mix well.

Brush the butter mixture onto each side of the bread slices, ensuring even coverage.

Fold swiss cheese slices on the diagonal and place one piece between each slice of bread.

Wrap the loaf of bread tightly in aluminum foil.

Bake in the preheated oven for 10-15 minutes, or until the cheese is melted and the bread is warm.

Remove from the oven, unwrap, and serve immediately.