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French Dip Sandwiches on a cutting board with homemade au jus sauce

French Dip Sandwich Recipe with Au Jus

An easy French Dip Sandwich with leftover Prime Rib, and a homemade Au Jus served warm.
Course Brunch, Lunch
Cuisine American, sandwich
Keyword Au Jus, French Dip Sandwich, Homemade Au Jus, Roast Beef Sandwich
Prep Time 20 minutes
Cook Time 10 minutes
Total Time 30 minutes
Servings 4 people
Calories 801kcal
Cost $25.00


  • 1 pound thinly sliced prime rib roast or other beef roast
  • 4 French or Hoagie Rolls
  • 8 slices Provolone Cheese (or Swiss Cheese)
  • 1 cup diced hot peppers, like Mama Lil's
  • ½ cup horseradish mayo (recipe below)
  • 8 leaves butter lettuce

Horseradish Mayonaise

  • ½ cup mayonaise
  • 3 tablespoons extra hot horseradish
  • ½ lemon juiced

Au Jus

  • 2 tablespoon extra virgin olive oil
  • 1 medium carrot, chopped
  • 1 rib celery, chopped
  • cup leeks, chopped
  • 2 cups beef stock or beef broth
  • 1 tablespoon whole peppercorns
  • 1 teaspoon red chili pepper flakes
  • ½ teaspoon kosher salt


Horseradish Mayo

  • Combine mayo, horseradish, and lemon juice into a bowl and combine.

Au Jus

  • In a medium size pan over medium heat add olive oil. Sauté carrots, celery, and leeks for 6 - 8 minutes or until soft. Add beef stock, peppercorns, chili pepper flakes, and salt and bring to a simmer for additional 15 - 20 minutes.
  • Strain solids and reserve warm liquid for the Au Jus. Discard the solids.

French Dip Sandwich

  • Turn on broiler on high. Slice the rolls open and add the provolone. Place under broiler on middle rack and remove when cheese melts, about 3 minutes.
  • Place remaining ingredients on the sandwich and then close the roll. Don't cut sandwich up, as it will make it easier to dip into the Au Jus.


We love to use leftover Prime Rib for these sandwiches. 


Calories: 801kcal | Carbohydrates: 40g | Protein: 35g | Fat: 56g | Saturated Fat: 10g | Trans Fat: 1g | Cholesterol: 90mg | Sodium: 2990mg | Potassium: 848mg | Fiber: 4g | Sugar: 5g | Vitamin A: 2901IU | Vitamin C: 83mg | Calcium: 436mg | Iron: 5mg