Heat a heavy-bottomed skillet and add 1/2 Tbsp. butter. Add the minced shallots and cook for 2 to 3 minutes until soft, but not browned.
Add wine, beef broth, pomegranate juice to the pan and increase heat until it begins to boil. Add Dijon mustard. Reduce heat and stir well to incorporate the mustard.
Cook for 10 - 12 minutes until the sauce is reduced and slightly thickened. You will have about 3/4 cup sauce. Remove from the heat.
Add the final 1 1/2 tablespoons butter to the sauce , stirring until the butter melts and the sauce becomes very velvety.
Remove from the heat. Re-heat very gently on low heat as you do not want the sauce to 'break' once you are ready to serve. This should only take a couple of minutes.
You can either add the pomegranate seed garnish directly into the sauce or top each serving with the fresh seeds.