Sprinkle salt and pepper on the sliced chicken. Let it stand for 10 minutes.
Heat the cooking oil in a pan.
Dip the chicken slices in beaten egg and then dredge in cornstarch.
Fry the coated chicken for about 2 minutes per side or until the color turns light to medium brown. Remove from the pan and place in a plate lined with paper towel.
Clean the pan and save about 2 tablespoons of cooking oil.
Heat the clean pan with the remaining cooking oil.
Add the onion and ginger. Cook for a minute.
Put-in the fried chicken slices. Stir.
Put-in the oyster sauce, soy sauce, garlic powder, and water (with cornstarch). Stir and continue cooking for 3 minutes in medium heat.
Add the broccoli florets. Cook for 2 to 3 minutes more.
Sprinkle salt and pepper to taste.
Transfer to a serving plate. Serve.
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