Prepare the Bulgogi Marinade: In a medium-sized bowl, combine the soy sauce, sesame oil, brown sugar, garlic, ginger, and rice vinegar. Stir well until the sugar is dissolved and everything is nicely blended. If you want a little spice, now’s the time to add the gochujang, just stir it in for that extra kick.

Cook the Ground Beef: Heat a large skillet or frying pan over medium-high heat. Add the ground beef and cook, breaking it up into small pieces as it browns. This should take about 5-7 minutes. Once the beef is fully cooked and browned, drain any excess fat if necessary.

Combine the Beef and Marinade: Once the beef is cooked, lower the heat to medium. Pour the prepared marinade over the beef and stir to coat all the meat evenly. Let it simmer for about 3-5 minutes, allowing the beef to soak up all the delicious flavors of the bulgogi sauce.

Finish and Serve: When the beef is perfectly coated and the sauce has thickened slightly, remove the pan from the heat. Stir in the scallions for a bit of crunch and fresh flavor.