Chop up/break off the broccolis, slice your ginger, chop your chili and garlic and onion. Set aside.
Bust out that wok (carbon steel pan) or pan.
Turn that flame to medium-high
Drizzle in your oil, enough to evenly coat the bottom and a bit of the sides of the wok. Make sure pan is hot. Toss in a bit of the minced garlic (saving the rest for later) — when the garlic starts sizzling, the pan is hot enough.
Toss in onion, ginger, and chili
Toss in that marinated chicken to the wok. Get all that sauce in there too.
Start stirring and flipping over, so as not to let anything burn. Keep up that stir-frying motion for a few minutes until chicken acquires its golden brown.
Toss in the broccoli
Toss in the garlic
Splash in the soy sauce and oyster sauce. Modify to taste.
Keep stir-frying until the broccoli is tender yet snappy (about 5 minutes)