Kumquats for garnish Rinse ducks, pat dry, and remove excess fat from body cavities. Truss the birds. Arrange them, breast side up, several inches apart on a rack set over a large roasting pan. Let them dry, chilled but uncovered, for 3 days. In a bowl, combine the Scotch, gingerroot, garlic, zest, coriander, peppercorns, soy sauce, honey, and brown sugar. Let this mixture stand, covered and chilled, for 3 days. Stir marinade, and press it through a fine sieve into a small bowl. Keeping the ducks chilled, brush them with some of the marinade, every 30 minutes, for 2-1/2 hours. Let the ducks dry at room temperature for 30 minutes. Stuff each duck with one of the bread slices, 1 scallion and 1 parsley sprig. Spoon remaining marinade into the