3 prime rib roast with mustard horseradish sauce Recipes

leftover prime rib roast , trimmed of most fat and cut into 1/2 to 1 cubes, boiled potatoes, onion, coarsely chopped, garlic cloves, salt and pepper, red wine (a good cabernet sauvignon), beef stock or 10 oz your leftover au jus sauce, ketchup and a-1 steak sauce, tomato paste, yellow mustard, hot grated horseradish, tabasco sauce (or other heat as you prefer)

standing rib roast (3-rib), kosher salt, fresh ground black pepper, mayonnaise, dijon mustard, whole grain mustard, prepared horseradish, sour cream, kosher salt, black pepper