Pile equal amounts of lettuce in the center of 4 bowls. Top each salad with the tomatoes, olives, and radish. Drizzle 2 tablespoons of the dressing over each salad, and sprinkle with the scallion. Serve.
Smoky Green Chile Ranch Dressing:
Yield:About 12 servings
Whisk all the ingredients together in a bowl. Refrigerate until needed.