Put the bread slices on a baking tray, crust-side up, and grill for 2 minutes until crispy.
In a small bowl, combine the softened butter, garlic, and parsley together. And mix well.
Spread the butter mixture over the cut sides of the bread - making sure to cover all the bread with the garlic butter. Sprinkle the parmesan evenly on top.
Place the bread back on a baking tray, face-side up, and grill for 2 to 3 minutes until toasty and golden.
Let the bread cool for a minute or two before cutting it into slices and serving.