Give Top Round Steak slices a quick dip in a flavorful marinade before stir frying. Meanwhile, a cool cucumber salad gets prepared to round out the meal.
Cut beef Top Round Steak lengthwise in half, then crosswise into 1/8-inch thick strips. Combine beef marinade ingredients in large bowl. Add beef; toss to coat. Cover and marinate in refrigerator 30 minutes to 2 hours.
Whisk cucumber marinade ingredients in medium bowl until sugar is dissolved. Stir in cucumber. Cover and marinate in refrigerator 20 to 30 minutes. Drain cucumber in colander; discard marinade. Set aside.
Remove steak from marinade; discard marinade. Heat oil in large skillet over medium-high heat until hot. Add 1/2 of beef; stir-fry 1 to 2 minutes or until outside surface of beef is no longer pink. (Do not overcook.) Remove from skillet. Repeat with remaining beef.
Toss cucumber, tomatoes, cilantro and peanuts in large bowl. Divide evenly among 4 plates. Arrange steak slices over salad.
Test Kitchen Tips Partially freeze steaks for about 30 minutes for easier slicing.