Heat oil in a skillet or wok. Add veggies and chicken.
Stir-fry until veggies are tender.
Meanwhile in a saucepan, combine broth, soy sauce, garlic, and ginger. Heat to almost boiling. In a cup combine water and corn starch until dissolved completely. Add to sauce. Cook stirring frequently until sauce thickens.
Add the sauce to the cooked veggies and chicken. Cook stirring often until heated through.