Leftover Prime Rib French Dip

BY: Mandy Tanner

  • cooking-duration 35 minutes
  • servings 4 SERVINGS
  • cooking-style stove
  • cooking-mode beginner

Cooked Prime Rib, thinly sliced and layered on a butter toasted roll with creamy horseradish and au jus for dipping. This au jus is made from store bought beef stock to cut down on time. Use Prime Rib bones for extra flavor if you have them, but it will be full of flavor either way.


Au Jus

  • 1 tablespoon olive oil

  • 1 small shallot, thinly sliced

  • 1 garlic clove, smashed

  • 1 sprig fresh rosemary

  • 1 sprig fresh thyme

  • 1 teaspoon sherry vinegar, optional

  • 2 cooked rib bones, if available, optional

  • 4 cups (32 oz) beef stock

  • Pepper, as needed

  • Kosher salt, as needed

French Dip

  • 1 ½ pound cooked prime rib, thinly sliced, fat removed Buy Now

  • 4 hoagie rolls, or similar, split lengthwise

  • 4 tablespoons unsalted butter, softened

  • ¼ cup horseradish

  • ¼ cup mayonnaise, or sour cream

  • Au Jus


Make the au jus. In a small (3 qt) saucepan over medium heat, add the olive oil and shallots and cook until softened, 2 minutes. Add the garlic, rosemary, thyme, sherry vinegar and rib bones, if using, and stir. Add the beef stock and bring to a simmer. Reduce heat as needed, and cook until reduce by half, about 20 minutes. Taste for seasoning and adjust, as needed with pepper, and salt. Strain into a serving dish, and keep warm.
20 minutes
In a small bowl, add the horseradish and mayonnaise, and stir to combine.
1 minute
Spread the softened butter on the cut side of the rolls.
1 minute
In a large skillet over medium heat, place the roll, cut-side-down, and toast until golden brown, 1-2 minutes. Remove from skillet and add the cooked prime rib with ¼ cup of the au jus or more as needed, and cook to warm the beef through, 2-3 minutes.
5 minutes
Spread the horseradish sauce on the toasted rolls, as desired, then fill with the prime rib, dividing evenly among the sandwiches. Serve with bowls of au jus for dipping, and additional horseradish sauce as desired. Enjoy!
2 minutes