Spring Salad with Mozzarella

2 1/2 cups baby lettuce leaves
1 ball (10 ounces) fresh mozzarella, halved lengthwise, sliced 1/2-inch thick crosswise
2 scallions, white and pale-green parts only, trimmed and thinly sliced
4 radishes, trimmed and sliced into rounds
Coarse salt and freshly ground pepper
2 tablespoons extra-virgin olive oil
 
Place lettuce on a platter, and arrange mozzarella and radishes on top. Sprinkle with scallions. Just before serving, season with salt and pepper, and drizzle with the oil.