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Prime Rib Sandwich with Roasted-Garlic Dijonnaise

Scott Phillips

Servings: four.

The sandwich is better if the beef isn’t refrigerator-cold, so either let the sliced beef warm at room temperature for about 15 minutes, or warm the sandwiches in the residual heat from the broiler after you’ve toasted the rolls.


For the dijonnaise:

  • 6 cloves garlic, peeled
  • 3 sprigs rosemary (3 to 4 inches each)
  • 1 Tbs. extra-virgin olive oil
  • Several pinches kosher salt
  • 1/4 cup mayonnaise
  • 1 tsp. Dijon mustard

To assemble the sandwiches:

  • 4 sandwich rolls, such as Kaiser or club rolls
  • 12 oz. thinly sliced leftover Slow-Roasted Prime Rib; about 2 cups
  • 2 cups sliced onion, sautéed
  • 2 cups sliced mushrooms, sautéed

Nutritional Information

  • Nutritional Sample Size based on four servings
  • Calories (kcal) : 710
  • Fat Calories (kcal): 430
  • Fat (g): 48
  • Saturated Fat (g): 13
  • Polyunsaturated Fat (g): 3
  • Monounsaturated Fat (g): 18
  • Cholesterol (mg): 75
  • Sodium (mg): 670
  • Carbohydrates (g): 40
  • Fiber (g): 2
  • Protein (g): 28


Make the dijonnaise:

  • Heat the oven to 350°F. Put the garlic in the center of a square of foil and arrange the rosemary sprigs on top. Drizzle the oil over the rosemary and garlic, and sprinkle with a pinch of salt. Gather the foil around the garlic into a pouch and put the pouch in a pie plate or other small baking dish (in case the oil leaks). Roast until the garlic is light golden and completely soft, about 30 minutes. Open the foil and let cool briefly. Discard the rosemary sprigs. Transfer the garlic to a small bowl and reserve the oil in the foil. Mash the garlic with the back of a spoon, and then stir in the mayonnaise, mustard, 1/2 tsp. of the garlic-rosemary oil, and a small pinch of salt.

Assemble the sandwiches:

  • Position a rack 3 to 4 inches from the broiler element and heat the broiler on high. Slice the rolls in half, set cut sides up on a baking sheet, and brush with the remaining rosemary-garlic oil. Toast under the broiler until golden brown, about 1 minute. Spread some Dijonnaise on the top and bottom of each roll. Arrange the beef over the bottom halves along with the sautéed onions and mushrooms and replace the tops.


Rate or Review

Reviews (5 reviews)

  • Krispie | 04/22/2017

    I made this for a tailgate - it was wonderful and easy. I will make it again.

  • MerrileeA | 12/28/2016

    Excellent for leftover prime rib. I do agree with the suggestion to add more olive oil when cooking the garlic.

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