Flank steak is what we like to use as it's affordable, lean, and great for stir-fries. Cutting flank steak against the grain will make this tougher cut less chewy. Skirt steak, sirloin tip, or tri-tip are good substitutes.
We used 1/2 cup of our Homemade Teriyaki Sauce which we make in larger batches and keep in the refrigerator. You can do the same and have extra on hand, or we have provided you with the measurements above for the appropriate amount of sauce for this recipe.
Store leftovers in an air-tight container kept in the refrigerator for 3-4 days. Reheat in a wok or skillet over medium-low heat until warmed through.