Follow these easy steps to create your Chinese Style Mango Chicken Stir Fry:

1. Prepare the Chicken: Slice the chicken breast into thin strips. Season with salt and pepper.
2. Mix the Sauce: In a bowl, combine soy sauce, oyster sauce, and cornstarch. Stir until smooth and set aside.
3. Heat the Pan: In a large skillet or wok, heat 2 tablespoons of vegetable oil over medium-high heat.
4. Cook the Chicken: Add the chicken strips to the pan. Stir-fry for about 5-7 minutes or until fully cooked. Remove from the pan and set aside.
5. Stir-Fry the Veggies: In the same pan, add the remaining tablespoon of oil. Stir-fry the garlic, ginger, bell pepper, and snap peas for about 3-4 minutes until they are vibrant and tender-crisp.
6. Add Mango and Sauce: Return the cooked chicken to the pan. Add the diced mango and pour the sauce over everything. Stir well to combine and cook for an additional 2-3 minutes until the sauce thickens.
7. Garnish and Serve: Remove from heat. Garnish with sesame seeds and fresh cilantro if desired. Serve hot over rice or noodles.

By following these straightforward steps, you can whip up a delicious Chinese Style Mango Chicken Stir Fry in no time!