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Amazing French Dip with Leftover Prime Rib

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Mary Smith

November 23, 2025

Two French Dip sandwiches made with leftover prime rib, cheese, and a side of au jus.

Oh, the joy after a big holiday meal is quickly followed by that age-old question: what do we do with all the leftovers? For me, prime rib sitting in the fridge isn’t just a sad remnant, it’s a ticket to pure sandwich magic! And honestly, my favorite transformation has to be this incredibly simple French Dip with Leftover Prime Rib. You’re talking about turning what might seem like just a roast into a gourmet sandwich in practically no time. Iโ€™ve made this countless times after Thanksgiving and Christmas dinners, and it never, ever disappoints. This French Dip with Leftover Prime Rib (How-To) is my secret weapon for delicious post-holiday meals.

A delicious French Dip sandwich made with leftover prime rib, served with a side of au jus.

Why You’ll Love This French Dip with Leftover Prime Rib

Seriously, where do I even start? This recipe is a game-changer for so many reasons:

  • Speedy Weeknight Wonder: You’ve already got the star ingredient cooked! This means we’re talking minutes, not hours, to get dinner on the table. Perfect for when you’re tired but still craving something amazing.
  • Crazy Easy: No complicated steps here. You’re basically just warming things up and assembling. If you can slice meat and toast bread, you’ve got this!
  • Flavor Explosion: That rich, savory prime rib paired with a quick, juicy au jus? Oh my goodness. It’s pure comfort food perfection that tastes way fancier than it is.
  • Zero Food Waste Hero: This is the ultimate way to use up those prime rib leftovers. Instead of letting them sit sadly in the fridge, you’re turning them into a whole new, exciting meal!

Gather Your Ingredients for French Dip with Leftover Prime Rib

Alright, let’s get our game faces on and gather everything we need to make this happen. Itโ€™s honestly pretty straightforward! Youโ€™ll want about a pound of your leftover prime rib โ€“ make sure itโ€™s sliced nice and thin, thatโ€™s key for a good French dip. And for the buns, grab four hoagie rolls or some good quality French bread that you can split lengthwise. Oh, and don’t forget a tablespoon of butter that weโ€™ll melt to give those rolls a lovely golden toast. These are the stars of the sandwich show!

A hearty French Dip sandwich made with leftover prime rib on a crusty roll, served with a side of au jus.

Now for the magic in a bowl โ€“ the au jus! You’ll need two cups of good beef broth as our base. Then, give it a little kick with one tablespoon of Worcestershire sauce, half a teaspoon of garlic powder โ€“ I love using powder here because it mixes in so smoothly โ€“ and just a pinch, about a quarter teaspoon, of black pepper. Thatโ€™s it! Simple, right? If you want to get fancier later, we can chat about adding things like provolone or Swiss cheese right onto the sandwich, but for the classic, this is all you really need.

Essential Equipment for Making French Dip

You don’t need a whole kitchen’s worth of gadgets for this, thankfully! The real stars are a good skillet for getting that prime rib perfectly warm and toasting your rolls to golden perfection, and a saucepan to whip up our flavorful au jus. Thatโ€™s really it! Simple tools for a simple, delicious meal.

Step-by-Step Guide: How to Make French Dip with Leftover Prime Rib

Alright, let’s get this simple masterpiece assembled! It’s so easy, you’ll wonder why you ever bought French dips from a deli.

Crafting the Perfect Au Jus

First things first, let’s get our dipping liquid ready. Grab a little saucepan and pour in your beef broth. Toss in that Worcestershire sauce, garlic powder, and black pepper. Give it a quick stir, then set it over medium heat. We just want to bring it to a gentle simmer โ€“ no need for a rolling boil here. Let it hang out and get nice and flavorful while we work on the sandwiches.

Heating and Assembling Your French Dip Sandwiches

Now, let’s get those rolls and steak ready! Get a skillet nice and warm over medium-high heat. While itโ€™s heating, brush the cut sides of your hoagie rolls with that melted butter. Pop them cut-side down in the hot skillet and toast ’em for just a minute or two until they’re a lovely golden brown. Keep an eye on them so they don’t burn! Once they’re toasty, set them aside. Now, toss your thinly sliced prime rib into the same skillet. You just want to warm it through, maybe 2 to 3 minutes, so it’s nice and cozy. Once it’s heated, pile that gorgeous prime rib high onto the bottom half of your toasted rolls. You can even add a little slice of provolone or Swiss cheese right on top before it goes on the roll if you like! Finally, place the top half of the roll on, dunk it into that warm au jus and enjoy!

A close-up of a delicious French Dip sandwich made with leftover prime rib and au jus.

Tips for the Best French Dip with Leftover Prime Rib

You know, making a *great* French dip sandwich with leftovers is all about a few little tricks I’ve picked up over the years. First off, slicing that prime rib is super important. You want to go against the grain and make it as thin as you possibly can. If your prime rib is cold from the fridge, it’s way easier to get those paper-thin slices. Don’t be afraid to really load up the roll, too โ€“ weโ€™re not being shy with this deliciousness!

Toasting the rolls is another biggie. I like to brush them with a little melted butter, like the recipe says, but sometimes I’ll throw in a tiny splash of that au jus into the pan *before* I toast the rolls. It gives them an extra layer of savory goodness thatโ€™s just incredible. Make sure you toast them until they’re golden brown and a little crispy, but not so much that they fall apart when you dunk them. Thatโ€™s the sweet spot! And for the au jus, if you want to get fancy, add a splash of dry red wine to the broth before it simmers, or even toss in a bay leaf. It really deepens the flavor. Trust me on this!

Two delicious French Dip sandwiches made with leftover prime rib and melted cheese, served with a side of au jus.

Also, remember that this is a great way to stick to clean eating or healthier eating principles because youโ€™re using up what you already have, minimizing waste and making the most of that beautiful prime rib!

Ingredient Variations and Substitutions

Now, this recipe is fantastic as is, but you know me โ€“ I love to play around! If you want to switch things up a bit, it’s super easy. Instead of provolone or Swiss cheese, which are great, try a gooey Gruyรจre or even some creamy Havarti. Totally delicious! And if hoagie rolls aren’t your jam, honestly, a good crusty baguette sliced lengthwise, or even some thick-cut sourdough, works wonderfully. For the au jus, if youโ€™re out of beef broth, a good quality chicken broth can work in a pinch, though the flavor will be a bit different. And feel free to add a splash of red wine to the broth before simmering โ€“ it really adds a lovely depth thatโ€™s just divine. This recipe is really forgiving, so go ahead and make it your own, especially if you’re looking for low-carb options!

Serving Suggestions for Your French Dip

So you’ve got these amazing French dip sandwiches, right? What do we serve alongside them? I’m all about keeping it simple so the sandwich shines. A crisp, light side salad is always a winner โ€“ think a mixed green salad with a light vinaigrette, you can totally find some lovely salad inspiration here. If you’re craving something a little more fun, some crispy kettle-cooked potato chips are fantastic for dunking too! Or, for a real classic feel, a small bowl of French onion soup on the side? Divine!

Frequently Asked Questions about French Dip with Leftover Prime Rib

Got questions about making this speedy sandwich? I’ve got answers!

Can I make this French Dip with other roast beef?

Absolutely! While prime rib is divine, this recipe works wonderfully with any good quality leftover roast beef. Just slice it thinly, and you’re good to go. Even a store-bought rotisserie beef can be transformed into a fantastic French dip this way!

How do I store leftovers of this French Dip?

Honestly, this sandwich is best enjoyed fresh! The toasted roll can get soggy if you try to store it pre-assembled. If you have extra au jus and warm beef, you can store them separately in airtight containers in the fridge for about 2 days. Reheat the beef gently in the au jus on the stovetop or in the microwave, toast fresh rolls, and assemble right before serving.

What kind of bread is best for French Dip?

You really want a sturdy bread that can hold up to dipping without falling apart! Hoagie rolls, French baguettes, or even a good quality ciabatta are fantastic choices. The key is a crusty exterior and a soft, chewy interior. Avoid super soft sandwich breads; they’ll just turn to mush!

Can I make the au jus ahead of time?

Yes, you totally can! The au jus holds up really well in the refrigerator for about 3-4 days. Just store it in an airtight container. When you’re ready to make your sandwiches, gently reheat the au jus on the stovetop until it’s nice and warm. It might even taste better the next day!

Nutritional Information (Estimated)

Just a heads-up, the nutritional facts for this amazing French Dip are estimates, and can totally change depending on the exact ingredients you use โ€“ like the beef you have leftover or even the brand of broth! But generally, you’re looking at something in the ballpark of 450-550 calories per sandwich, with around 25-35g of fat, 30-40g of protein, and 30-40g of carbs. Itโ€™s a satisfying meal that makes the most of those leftovers. Check out some calorie-smart recipe ideas if you’re tracking!

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  • Author: Mary

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