Brush steak with 2 tablespoons vinaigrette; sprinkle with salt and pepper. Cook steak in a large skillet coated with cooking spray over medium-high heat for 5-7 minutes on each side or until meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°; medium-well, 145°). Let stand for 5 minutes before slicing., Divide salad mix among four plates. Top with radishes, onions, cucumber, peas, tomatoes and cilantro. Arrange sliced steak over salads; drizzle with remaining vinaigrette.