French Dip Grilled Cheese Sandwich is perfect for dinner, parties or game nights! Serve with the dipping sauce on the side for the ultimate, amazing flavor!
- 2 tablespoons unsalted butter
- 2 medium sweet onions sliced
- 4 garlic cloves minced
- 1 tablespoon brown sugar
- 1 teaspoon Worcestershire sauce
- 3/4 cup beef broth
- 1 packet Au Jus seasoning mix seasoning
- 3 tablespoons unsalted butter melted
- 8 sliced of white sandwich bread
- 16 slices provolone cheese
- 16 slices deli roast beef
- caramelized onions – leftover from the Sauce
- French fried onions
Place a cast iron skillet over high heat. Once the skillet is hot, add 2 tablespoons of butter.
Once the butter has melted add sliced onions and cook for 3 minutes, stirring occasionally. Add garlic and brown sugar, stir and cook for another 3-4 minutes.
Remove half of the onions to a plate and set aside. You will use them when assembling the sandwich.
Reduce heat to medium, and add Worcestershire sauce and beef broth to the remaining onions in the skillet. Stir and cook for about 1-2 minutes.
Add the Au Jus mix and cook for 3-4 or until the sauce has thickened.
Transfer sauce to a bowl and set aside. Wipe the skillet clean.
Place skillet over medium heat, add some melted butter to the skillet.
Smoother the bread with butter on one side only.
Place bread butter side down on a cutting board.
Add 2 slices of cheese, 4 slices of deli roast beef, caramelized onions and some french fried onions (optional), 2 more slices of cheese. Top with another bread slice, butter side up. Cook in the skillet, slightly pressing on the sandwich. Or cook on the griddle. Flip on the other side after 2-3 minutes of cooking, press slightly and continue cooking until golden brown, about 2 more minutes.
Serve with the dipping sauce and french fried onions.