3 medium yellow onions, halved and sliced ⅛-inch thick
1 tablespoon balsamic vinegar
kosher salt
12 ounces provolone cheese, grated
4 good quality hoagie rolls, split (don't cut all the way through, you want it to open like a book)
crushed red pepper, for garnish (optional)
Instructions
In a large bowl, combine the garlic, yellow onion, scallions, soy sauce, sesame oil, brown sugar, ⅛ teaspoon black pepper, and gochujang. In a large zip top bag, add the meat to the marinade and mix well, making sure that each piece is throughly coated. Cover, refrigerate, and allow to marinate for 2 hours.
To caramelized onions - melt the butter and olive oil in a large saute pan over medium heat. Add the onions and cook, stirring occasionally. Cook for 35 - 40 minutes until soft and caramelized. Add the balsamic vinegar and season with salt and pepper to taste. Toss to combine and set aside.
Using a heavy-bottomed skillet over high heat, add a ¼ of the beef along with some of the marinade and toss to cook for about a minute. Form the beef into the approximate length of the hoagie roll and top with a ¼ of the caramelized onions and ¼ of the shredded cheese. Add a tablespoon of the reserved marinade to the pan (this will create steam, which will help keep the beef moist and help melt the cheese). Cover the pan with a lid and allow the beef to cook and the cheese to melt, about 1minute. (You can prepare two sandwiches at time if your pan is big enough).
Using two spatulas, one on either side, scoop up the beef and place inside the hoagie rolls. Sprinkle with some crushed red pepper if desired. Serve immediately and enjoy!
Notes
Pop the sirloin in the freezer for 20 minutes to make slicing easier.
Recipe by at https://hapanom.com/bulgogi-philly-cheesesteak/