Making Mongolian Chicken is simple if you follow these easy steps:

1. Marinate the Chicken: In a bowl, combine the sliced chicken with 2 tablespoons of soy sauce and let it marinate for about 10 minutes.
2. Prepare the Sauce: In a small bowl, whisk together the remaining soy sauce, brown sugar, and cornstarch mixture. Set aside.
3. Heat the Oil: In a large skillet or wok, heat the vegetable oil over medium-high heat.
4. Cook the Chicken: Add the marinated chicken to the skillet. Stir-fry for about 5-7 minutes or until the chicken is cooked through and no longer pink.
5. Add Garlic and Ginger: Stir in the minced garlic and grated ginger. Cook for another 1-2 minutes until fragrant.
6. Add Sauce: Pour the prepared sauce over the chicken, stirring well to coat. Cook for an additional 2-3 minutes until the sauce thickens.
7. Add Green Onions: Add the sliced green onions and toss to combine everything well.
8. Garnish: If desired, sprinkle with sesame seeds for added flavor and crunch.
9. Serve: Remove from heat and transfer to a serving platter.

These steps will guide you seamlessly in creating this incredible dish in no time.