Stir-frying happens quickly, so let’s walk through the steps methodically:

1. Prepare Vegetables:

• Heat 1 teaspoon of vegetable oil in a large frying pan or wok over medium heat.
• Add the broccoli florets and sliced mushrooms (if using). Stir-fry for approximately 4 minutes, or until the vegetables are tender-crisp (bright green and slightly softened but still with a bite).
• Add the minced ginger and minced garlic to the pan with the vegetables. Stir-fry constantly for 30 seconds more, until fragrant.
• Remove the vegetables (and aromatics) from the pan; place them on a plate and cover loosely to keep warm.

2. Cook the Chicken:

• Wipe the pan clean with a paper towel (carefully, it’s hot!). Turn the heat up to high.
• Add the remaining 1 tablespoon of vegetable oil to the hot pan.
• Season the chicken pieces generously with salt and pepper.
• Carefully add the seasoned chicken pieces to the hot pan in a single layer. Do not overcrowd the pan – cook in batches if necessary to ensure searing rather than steaming.
• Cook the chicken for 3-4 minutes on each side, until golden brown and cooked through.

3. Prepare the Sauce:

• While the chicken cooks (or just before), prepare the sauce. In a bowl, whisk together the oyster sauce, chicken broth (or water), sugar, toasted sesame oil, and soy sauce.
• In a separate small bowl, mix the cornstarch with 1 tablespoon of cold water until smooth, creating a slurry. Set both aside.

4. Combine and Finish:

• Add the cooked vegetables back to the pan with the cooked chicken. Toss briefly to combine and reheat the vegetables, about 1-2 minutes.
• Pour the prepared oyster sauce mixture over the chicken and vegetables. Cook, stirring, for 30 seconds.
• Stir the cornstarch slurry again quickly, then add it to the pan. Bring the sauce to a boil, stirring constantly. Cook for 1 more minute, or until the sauce has just started to thicken and turns glossy.

5. Serve:

• Serve the Chicken and Broccoli Stir Fry immediately, typically over steamed rice if desired.

Quick cooking over high heat is essential!