1. In a slow cooker, combine the cornstach-coated flank steak, toasted sesame oil, minced garlic, and minced ginger.
2. In a separate bowl, mix together the soy sauce, brown sugar, and water until well combined.
3. Pour the soy sauce mixture over the beef in the slow cooker, ensuring that the beef is well coated.
4. Cover the slow cooker and cook on low heat for 4-5 hours or on high heat for 2-3 hours, until the beef is tender.
5. If using, stir in the green onions during the last 30 minutes of cooking. Serve the slow cooker Mongolian beef over rice or noodles, and garnish with additional green onions if desired. Enjoy!

So, dear reader, don’t let the hustle and bustle of life keep you from enjoying a comforting and delicious homemade meal. Save this Slow Cooker Mongolian Beef recipe and let it become your go-to dish whenever you need a little pick-me-up. Trust me, you won’t be disappointed.