Horsey Mustard Sauce Horsey Mustard Sauce, we enjoy the robust flavor of mustard and like the flavor it ads to your meats as they roast. We have used it as a base on pulled pork, and big beef, always good. Tonight we were doing a prime rib roast and thinking a mustard crust was sounding good. Patti made a Horsey Mustard Sauce with just a hint…