Creating Mongolian Chicken is easy if you follow these straightforward steps:

1. Prepare Chicken: Slice the chicken breasts into thin strips. This allows for quicker cooking and better absorption of flavors.
2. Make the Sauce: In a bowl, combine soy sauce, brown sugar, minced ginger, garlic, and black pepper. Stir until the sugar is dissolved.
3. Heat Oil: In a large skillet or wok, heat vegetable oil over medium-high heat. Ensure the oil is hot but not smoking.
4. Cook Chicken: Add the sliced chicken to the skillet. Cook for about 5-7 minutes, stirring frequently, until the chicken is browned and cooked through.
5. Add Sauce: Pour the sauce over the cooked chicken. Stir well to coat the chicken evenly in the sauce.
6. Thicken Sauce: Allow the sauce to simmer for another 3-5 minutes, or until it thickens slightly.
7. Finish with Green Onions: Stir in the chopped green onions and cook for an additional minute.
8. Serve: Remove from heat and sprinkle sesame seeds on top before serving.

These steps will guide you in effortlessly preparing this mouthwatering dish.