1.In A Large Skillet Over Medium-High Heat, Brown Pork In Butter On Both Sides. Remove And Keep Warm. Set Aside 1/4 Cup Of Broth. Add The Potatoes, Mustard, Worcestershire Sauce, Salt, Pepper And Remaining Broth To The Skillet. Bring To A Boil. Reduce Heat; Cover And Simmer For 15-17 Minutes Or Until The Potatoes Are Tender. 2.Stir In Mushrooms, Onions And Pork. Cover And Simmer For 5 Minutes Longer Or Until Meat Is No Longer Pink. In A Small Bowl, Combine The Flour And Reserved Broth Until Smooth. Stir Into Pork Mixture. Bring To A Boil; Cook And Stir For 2 Minutes Or Until Thickened.