Cut beef steak lengthwise in half and then crosswise into 1/8 inch thick strips. In medium bowl, combine beef and 2 tablespoons teriyaki sauce; toss to coat. In small bowl, combine remaining 3 tbsp. teriyaki sauce, peanut butter, 1 tablespoon water, ginger and hot chili sauce. 

Meanwhile, in large nonstick skillet or wok, heat oil over medium-high heat until hot. Add beef (1/2 at a time) and stir-fry 1 to 2 minutes or until outside surface is no longer pink. Remove steak from wok. Toss steak with peanut butter mixture to coat. Sprinkle with chopped cucumber.