Creating Beef Teriyaki at home is straightforward. Just follow these simple steps:

1. Prepare the Marinade: In a bowl, whisk together the soy sauce, brown sugar, rice vinegar, mirin, sesame oil, garlic, and ginger until well combined.
2. Marinate the Beef: Place the thinly sliced beef in a resealable bag or a shallow dish. Pour the marinade over the beef, ensuring that each piece is coated. Let it marinate for at least 15 minutes.
3. Heat the Pan: In a large skillet or wok, heat a little oil over medium-high heat.
4. Cook the Beef: Remove the beef from the marinade, reserving the marinade for later. Add the beef to the hot skillet and cook for about 3-5 minutes, or until browned and cooked through.
5. Add the Marinade: Pour the reserved marinade into the skillet with the cooked beef. Bring it to a simmer, allowing the sauce to thicken for about 2-3 minutes.
6. Garnish: Once thickened, remove from heat. Garnish with chopped green onions and sesame seeds.
7. Serve: Serve the Beef Teriyaki hot over a bed of cooked white rice.

These steps will guide you in creating this incredible dish with ease!