Add the butter, garlic, harissa, parsley, salt and pepper to a bowl and mix well with a spoon until it’s all evenly combined.
Cut your bread loaf in half and spread with the harissa butter.
Top with as much shredded mozzarella and parmesan as you want.
Transfer to a baking pan covered with parchment paper.
Bake at 180C until the cheese has melted and become golden brown (about 10-15 min).
Serve warm (I topped with some chopped fresh parsley in the end).
