Heat oil in wok or large frying pan
Saute onions until they turn translucent
Stir in minced garlic; mix until garlic starts to turn golden brown
Add chicken, cook until done, stirring constantly
Add Veggies, cook until they start to get tender, stirring constantly
Stir in soy and oyster sauce
Slowly stir in cornstarch water. The sauce should start to thicken.
Once the sauce is thick enough remove from heat and serve with steamed white rice!