Making Chicken with Mixed Vegetable Stir Fry is simple when you follow these straightforward steps:

1. Prep Your Ingredients: Gather and slice your chicken breast and vegetables. Mince the garlic and grate the ginger.
2. Marinate Chicken: In a bowl, combine chicken strips with soy sauce, oyster sauce, cornstarch, and a pinch of salt and pepper. Let it marinate for 10 minutes.
3. Heat the Oil: In a large skillet or wok, heat the vegetable oil over medium-high heat until shimmering.
4. Cook Chicken: Add the marinated chicken to the skillet in a single layer. Let it cook for about 5-7 minutes until browned. Stir occasionally for even cooking.
5. Add Aromatics: Once the chicken is almost cooked through, add minced garlic and ginger. Stir-fry for about 1 minute until fragrant.
6. Stir in Vegetables: Add the mixed vegetables to the skillet. Cook for an additional 5-7 minutes, stirring frequently until the veggies are tender but still crisp.
7. Adjust Seasonings: Taste and adjust seasoning with more soy sauce, salt, or pepper as desired.
8. Thicken Sauce: If you prefer a thicker sauce, mix a tablespoon of cornstarch with water and slowly add it to the skillet, stirring until combined.
9. Serve: Once everything is well coated and heated through, turn off the heat and remove the stir fry from the skillet.