Don't know about Argo's recipe, but the easiest glaze for duck breasts is probably a few spoons of orange marmalade and some chardonnay in a sauce pan, reduce it slowly until it begins to thicken and then throw a big pat of real butter into it. The butter enriches the flavor and gives it a very nice sheen.

My favorite is Smucker's apricot preserves reduced with Jack Daniel's and the big butter pat. Dead nuts simple to execute and it will amaze your friends.