10 Minute French Onion Roast Beef Sandwiches


Do you like roast beef dips? How about Philly cheese steaks? Caramelized onions? Can you imagine the happy dance your tastebuds will do when these two great sandwiches marry in your mouth?  It truly is the birth of something monumental. I have had a true Philly Cheesesteak at Geno’s in the heart of Philadelphia. I have also had the signature French dip at Phillipe’s in downtown Los Angeles. These are in no way comparable to each other and they stand alone in delectability. But if, just if, they had a child in your kitchen, these 10 Minute French Onion Roast Beef Sandwiches would taste pretty darn close. It’s the closest, quickest, and most delicious version you can make in your own home without grilling your own steak, making your own cheese sauce, or baking your own bread.

Start by slicing one green bell pepper and 1 medium sized onion into thin strips. Saute the veggies in 1 Tablespoon of oil until they are soft with browned char marks.

While the veggies are cooking, get a regular sized can of French onion soup and 1 Tablespoon of worcestershire sauce. Heat them over medium heat in a small sauce pan.

When the soup has come to a light boil, turn the heat off and put in your roast beef slices. Let them marinate in the soup for a few minutes.

Line a cookie sheet with foil and slice open your french rolls. Be careful to leave the bottoms of the rolls attached so that the meat doesn’t fall out.

Use tongs to pull out the roast beef and place a few slices into each hoagie roll. Spoon some extra french onion soup on top if you like that carmelized onion taste.

Now divide the bell pepper and onion mixture among your sandwiches.

Cut one slice of provolone cheese in half and spread the two halves on top of the sandwiches. Pop the sandwiches into a 400 degree oven for about 3-5 minutes or until the cheese is just melted.

Ooooooo La La! Don’t those look incredible? My husband loves to use the extra french onion soup for dipping his sandwich in. He also likes to top his sandwich with banana peppers and eat it alongside kettle or BBQ chips.

I think these would be great to serve on a family game night, when having a casual backyard dinner with friends, or when your teenagers invite all their friends over. When I want a more substantial meal, I’ll add my apple, broccoli, and horseradish slaw as a side dish. I’m sure you can find a use for these, right? For more quick dinner ideas, check out my 30 Minute Meals or my boards on Pinterest. Happy cooking, y’all!

10 Minute French Onion Roast Beef Sandwiches

Heidi Davison
These 10 minute french onion roast beef sandwiches may be low on time but they are high in flavor! They are great to serve for a casual gathering, game night, or amongst teenagers!
Prep Time 5 minutes
Cook Time 5 minutes
Total Time 10 minutes
Course Entree
Cuisine American
Servings 6


  • green bell pepper cut in slivers
  • medium onion cut in slivers
  • 1 Tbsp oil
  • 6 French sandwich rolls
  • 1 can french onion soup
  • 16 oz sandwich sliced roast beef
  • 1 Tbsp worcestershire sauce
  • 6 slices provolone cheese halved
  • Optional: banana peppers


  • Heat oven to 400 degrees.
  • Line cookie sheet with foil.
  • Saute bell pepper and onion in oil until soft and slightly charred, about 5 minutes. Set aside.
  • Heat soup and worcestershire sauce in small sauce pan until boiling.
  • Reduce heat, add roast beef, heat through 1-2 minutes.
  • Open french rolls on cookie sheet and fill with roast beef mixture.
  • Divide veggies among sandwiches.
  • Top with two halves of provolone cheese.
  • Heat in oven until cheese melts.
  • Serve warm with reserved soup for dipping.


If a classic french dip sandwich and a Philly cheesesteak could have a love child, it would be these easy 10 minute French Onion Roast Beef Sandwiches. They are served hot, quick to make, and give all that authentic flavor in your very own kitchen.

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