Put all ingredients in a heavy saucepan. Bring to a boil slowly. Cook until mixture has been reduced by a quarter. Cool to room temperature and refrigerate.
In a heavy saucepan melt the butter. Add the shallots and the garlic and cook without browning for 3 minutes over medium heat. Add the bourbon and reduce by half. Whisk in the beef broth, cream, mustard and salt. Reduce by one-third, about 15 minutes.
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