1. In a small bowl, whisk together the soy sauce, brown sugar, sesame oil, garlic, ginger, rice vinegar, and red pepper flakes. This is your marinade, a harmonious blend reminiscent of those aromatic pots my abuela would stir with such care.
2. Place the beef strips in your slow cooker and pour the marinade over them, making sure each piece is well-coated. Add the beef broth, then give it a gentle stir.
3. Set your slow cooker to low and let it work its magic for about 6-7 hours, or until the beef is tender and the flavors have melded beautifully. If you’re in a hurry, you can cook it on high for 3-4 hours.
4. About 30 minutes before the cooking time is up, stir in the cornstarch slurry to thicken the sauce. This step brings everything together, creating a luscious coating on the beef.
5. Once done, garnish with chopped green onions and sesame seeds before serving. This final touch adds a fresh and nutty note to the dish.

While cooking, take a moment to enjoy the rich aroma that fills your home. It’s a scent that transports me back to those early days in my family’s kitchen, learning the art of patience and anticipation.