To prepare dressing, combine first 5 ingredients; set aside.
To prepare salad, sprinkle both sides of steak with salt and black pepper. Heat a large nonstick skillet coated with cooking spray over medium-high heat. Add steak; cook 8 minutes or until desired degree of doneness, turning after 4 minutes. Remove steak from pan; cover and set aside. Combine lettuce and remaining ingredients in a large bowl; drizzle with 3 tablespoons dressing. Arrange 1 1/4 cups salad on each of 4 plates. Cut steak diagonally across grain into thin slices. Divide steak evenly among salads; drizzle with remaining dressing.