Prepare all ingredients: wash, cut, and measure everything before cooking (mise en place).
Heat oil in a wok over high heat. Add aromatics (ginger, garlic, scallions) and stir briefly until fragrant.
Add the main ingredient (meat/vegetables/tofu) and cook using the appropriate technique.
Add seasonings and sauce. Stir well to coat evenly. Adjust heat as needed.
Continue cooking for 2-5 minutes until the main ingredient is cooked through and well seasoned.
Transfer to a serving plate, garnish with scallions or cilantro, and serve hot.
Tips
Have all ingredients prepped and measured before you start cooking. Chinese stir-fry moves fast once the wok is hot - there is no time to chop or measure mid-cook.