Roast Beef Sandwiches Get 10X More Flavorful When You Cook The Meat In This Rich Canned Soup

While you can embellish roast beef sandwiches with all kinds of condiments and fillings to make them more flavorful, you should start with the roast beef itself. And a can of French onion soup is the key to 10X more flavorful roast beef.

Considering beef stock is often the foundation of French onion soup, it's no secret that the sweet and aromatic flavors of caramelized onions pair perfectly with the umami-richness of beef. So, cooking roast beef in French onion soup combines the best of both worlds with a beef stock foundation and all of those sweet onion notes to amp up its flavor. You can cook premade deli roast beef in a can of French onion soup and a dash of Worcestershire sauce over the stove for a few minutes to not only infuse it with savoriness and depth, but also to convert firm deli meat into a melt-in-your-mouth, fall apart, and shred-able roast beef more like one you'd make in a crock pot. To that effect, you can also replace some of the beef broth called for in a crock pot roast beef recipe with a can of French onion soup. Substitute the cup of beef stock for French onion soup in this slow-cooker recipe and still add rye whiskey and other liquid and dry seasonings. You can also keep the roast beef nice and moist after shredding it by placing it back into the crock pot with the French onion soup base while you prepare the sandwiches.

Now that you've infused your roast beef with French Onion flavor for a super tasty start to a roast beef sandwich, there are plenty of other tips for assembly that'll bring even more flavor to the final result. You can start with the type of bread you use. If you want to accentuate the onion flavor, you can assemble your sandwich on an onion roll. If you want a nuttier complement to the sweet and savory onion and beef, use a poppyseed Kaiser roll. Honor a French onion and French dip sandwich by using a crusty French loaf like a wide baguette. Condiments like horseradish sauce, spicy mustard, and garlic aioli will work well with a French-onion infused roast beef. Caramelized onions would take the sandwich to the next aromatic level!

If you're using pre-sliced deli meat roast beef, you can use the French onion soup that's still in the pot as a kind of au jus to dip the sandwich in. Likewise, leftover cooking liquid from your crock pot is the ultimate au jus for a French dip. Of course, a French dip is only one roast beef sandwich the French onion dip-infused roast beef will work well on. You can use it in an Italian-style roast beef sandwich, shredded and stuffed into a hoagie with spicy pickled peppers and giardiniera.