Heat the oil in a large skillet. Stir in the onion and garlic and cook, stirring, over high heat for 3 minutes.
Stir in the package of vegetables. Cook, stirring for 5 minutes.
Season with the soy sauce and hot pepper sauce and toss in the chicken.
Cook 2 minutes longer, stirring.
Serve over rice.
Serves 4 to 6.