Heat large nonstick skillet over medium heat until hot. Place beef steaks in skillet; cook 12 to 15 minutes for medium rare (145°F) to medium (160°F) doneness, turning occasionally. Remove; let stand 10 minutes.
Whisk dressing ingredients in small bowl until blended.
Carve steaks. Combine beef, onion and cilantro in medium bowl. Add dressing; toss. Serve on salad greens. Sprinkle with peanuts.