Preheat oven to 400 degrees. In a skillet melt butter and add half and half. Stir together continuously and let come to a simmer, about 5 minutes. Add in garlic and grated parmesan. Continue stirring until the cheese has melted in, about 2 minutes. Add salt and pepper to taste. Place shrimp in and cook for 60 seconds, remove from stove

On a baking sheet lined with parchment paper, place flatbread down and spoon on the alfredo sauce with shrimp. Top with mozzarella cheese and bake for 10 minutes. Remove from oven and top with parsley and arugula. Serve right away