In a small mixing bowl, combine butter, garlic, oregano, thyme, rosemary, sage, mustard, salt, pepper and red pepper flakes.
9 tablespoons unsalted butter, 2 cloves garlic, 1 teaspoon chopped fresh oregano leaves, 1 teaspoon chopped fresh thyme leaves, 1 teaspoon chopped fresh rosemary leaves, 1 teaspoon chopped fresh sage leaves, 2 teaspoons Dijon mustard, 1 teaspoon kosher salt, ½ teaspoon freshly ground black pepper, ¼ teaspoon crushed red pepper flakes