Roast Beef Panini with Au Jus

close up shot of roast beef panini with au jus cut in half and stacked on top of each other

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5 from 1 vote

Delicious roast beef, au jus sauce and melted cheese make this roast beef panini with au jus a tasty lunch option.

Prep Time15

Cook Time5

Total Time20

Course: Main Course

Cuisine: American

Keyword: Roast Beef Panini with Au Jus

Servings:

Calories: 783kcal

Ingredients

2 pounds deli roast beef thinly sliced
8 pieces thick sliced sourdough bread
16-20 slices Havarti cheese sandwich sliced
2 small onions sliced into thin half circles
3 cups beef broth low sodium
1 (1-ounce) package Au Jus mix (I used McCormick brand)
3 tablespoons butter plus more for buttering the bread slices
1 tablespoon sugar
1 teaspoon Worcestershire sauce
½ teaspoon salt
¼ teaspoon black pepper

Instructions

In a large skillet saute, on medium heat, the sliced onions with the butter, sugar, salt and pepper for 5-6 minutes or until soft and lightly golden. Remove two-thirds of the cooked onions (leaving ⅓ of them still in the skillet) and place them in a bowl. Set them aside for later.
Add the beef broth, Worcestershire sauce and the packet of au jus mix to the skillet with the cooked onions and whisk to combine. Return your heat to medium-high and bring your au jus liquid up to a boil. Reduce the heat to low and simmer, stirring often to avoid lumps, for an additional 4-5 minutes or until the liquid has reduced and has made a nice rich dipping sauce.
Using a ladle, remove ⅓-½ a cup of liquid to place into a small bowl or ramekin. Repeat four more times. You will use these to serve with your roast beef panini sandwiches for dipping.
Once you have removed your au jus for dipping, you will add your sliced deli roast beef to the skillet, on medium-low heat, and gently toss your meat in the remaining liquid in the skillet. You will warm your meat through for 5-6 minutes or until no pink remains in your roast beef. Turn off the heat.
Preheat your panini press according to the manufacturer's instructions.
To assemble your roast beef paninis you will generously butter two slices of bread on one side, place the buttered side down on the plate. Lay 2 (or 3 if your slices are small) slices of havarti cheese onto the bread, then spoon on some of the sauteed onions (about 1-2 tablespoons) and spread them evenly over the cheese.
Next, place a ¼ of the warmed meat mixture onto the onions and spread it evenly. Make sure you allow as much excess liquid to drip off of the meat, into the skillet, before placing the meat onto the bread slices to avoid the bread getting soggy. Finally, top the meat with an additional 2 slices of cheese.
Place the second piece of buttered bread, butter side facing up, onto the meat.
Place your sandwich onto your preheated panini press for 2-3 minutes or according to the manufacturer's instructions. Your roast beef panini sandwich should be golden and your cheese melted.

Video

Notes

TIP: Make sure you allow as much excess liquid to drip off of the meat, into the skillet, before placing the meat onto the bread slices to avoid the bread getting soggy.

Nutrition