This simple salad combines mellow and bitter lettuces with sweet-tart vinaigrette.
Quarter, core, and tear radicchio and Boston lettuce into bite-size pieces; trim tough stems from spinach. Rinse leaves and dry well. Toss together in a large bowl.
In a small bowl, whisk together balsamic vinegar, olive oil, and honey; season with coarse salt and ground pepper. Just before serving, drizzle over lettuce; toss gently.
