Early in our marriage (when I didn't have anything cooking-wise, least of all a clue!), I would browse the grocery store entryway for recipes. And the wondrous thing about this type of recipe is that they tend to be fool-proof, delicious, and usually affordable. This one is Asian in base and the trick to making Asian-tasting food is to use Asian tasting ingredients like sesame oil. My biggest mistake back then was to use the suggested substitutes because they were what I had on hand. And who (in a primarily Dutch community) keeps sesame oil on hand. The first time I splurged was amazing!
In medium bowl, combine marinade ingredients. Remove 2 tbsp; set aside. Stack beef steaks; cut lengthwise in half and then crosswise into 1" wide strips. Add beef to remaining marinade in bowl; toss to coat.
Heat large non-stick skillet over medium-high heat until hot. Add beef (½ at a time) and stir-fry 1 minute or until outside surface of beef is no longer pink. (Do not overcook). Remove from skillet.
In same skillet, combine vegetables and water; cook 4 to 5 minutes or until water is almost evaporated and vegetables are hot, stirring occasionally. Combine cornstarch mixture and reserved marinade; add to vegetables. Cook and stir 1 minute or until thickened and bubbly. Return beef; heat through. Serve over rice.