A delightful twist on the classic roast beef and cheese sandwich, perfect for a quick and satisfying meal.
Melt the butter in a skillet over medium heat.
Using unsalted butter allows you to control the saltiness of the dish.
Add the sliced onions to the skillet and cook until they are caramelized.
Stir the onions occasionally to prevent them from burning.
Pour the beef broth into the skillet and bring it to a simmer.
Simmering the broth enhances its flavor.
Add the roast beef slices to the skillet and warm them in the broth.
Avoid overcooking the beef to keep it tender.
Place the warmed beef and onions onto the rolls.
Use a slotted spoon to drain excess broth from the beef and onions.
Top each sandwich with a slice of Swiss cheese.
You can use other types of cheese for a different flavor.
Place the sandwiches under the broiler until the cheese melts.
Keep an eye on the sandwiches to prevent the cheese from burning.
Serve the sandwiches with a side of the au jus for dipping.
Serve the au jus in small bowls for easy dipping.