Add the melted butter, smoked paprika, salt, pepper, oregano, parsley, Parmesan, and panko breadcrumbs to a 13x9 baking dish. Mix to combine.
1/4 cup unsalted butter, 1 teaspoon smoked paprika, 1 teaspoon kosher salt, 1/2 teaspoon black pepper, 1 teaspoon dried oregano, 1/4 cup fresh parsley, 1/2 cup Parmesan cheese, 1/4 cup panko bread crumbs