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Explore the mouthwatering world of comfort food with our Caramelized Onion & Cheese Steak Sandwich recipe. This delectable meal combines the rich flavors of tender flank steak, sweet caramelized onions, and gooey provolone cheese, all nestled in a crusty hoagie roll. Perfect for a hearty lunch or dinner, this recipe is not only satisfying but also easy to prepare. Join us as we guide you through the steps to create this culinary delight that will impress family and friends alike.

Caramelized Onion & Cheese Steak Sandwich

Dive into the deliciousness of our Caramelized Onion & Cheese Steak Sandwich! This recipe brings together juicy flank steak, sweet caramelized onions, and melted provolone cheese, all tucked into a crusty hoagie roll. Perfect for lunch or dinner, it's simple to make and guaranteed to impress your family and friends. Discover the magic of caramelized onions and how to perfectly cook flank steak, and enjoy a comforting meal that's sure to be a crowd-pleaser.
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Ingredients
  

1 lb (450g) flank steak, thinly sliced

2 large onions, thinly sliced

2 tablespoons olive oil

1 tablespoon butter

1 tablespoon balsamic vinegar

1 teaspoon sugar (optional, for sweeter onions)

Salt and pepper, to taste

4 slices of provolone cheese (or cheese of your choice)

4 hoagie rolls or crusty bread of your choice

Fresh arugula or spinach, for garnish (optional)

Instructions
 

Caramelize the Onions:

    - In a large skillet, heat the olive oil and butter over medium heat. Once melted, add the sliced onions. Stir to coat and then reduce the heat to low. Cook the onions slowly for about 30-40 minutes, stirring occasionally. They should become soft, golden-brown, and caramelized.

      - If you prefer, add sugar for a sweeter flavor and splash of balsamic vinegar towards the end for a hint of tanginess. Season with salt and pepper to taste. Remove from heat and set aside.

        Cook the Steak:

          - In the same skillet (or a separate one for quicker prep), increase the heat to medium-high. Season the flank steak slices with salt and pepper.

            - Quickly sear the steak in the hot skillet for about 2-3 minutes on each side until browned and cooked to desired doneness. Combine with the caramelized onions in the skillet and mix well.

              Melt the Cheese:

                - Place the provolone cheese slices over the steak and onion mixture. Cover the skillet with a lid for about 1-2 minutes to allow the cheese to melt.

                  Assemble the Sandwich:

                    - Slice the hoagie rolls or crusty bread lengthwise, but not all the way through, allowing them to open like a book.

                      - Spoon the steak, onion, and melted cheese mixture into each roll. If desired, add a handful of fresh arugula or spinach for a peppery crunch.

                        Serve:

                          - Serve the sandwiches warm, and enjoy with your favorite side, like fries or a simple salad.

                            Prep Time, Total Time, Servings: 10 mins | 50 mins | 4 servings