Preheat oven to 350°.
To prepare salad, place bread cubes in a single layer on a jelly-roll pan. Bake at 350° for 12 minutes or until toasted. Cool.
Combine bread cubes, lettuce, radicchio, oranges, and olives in a large bowl.
To prepare the vinaigrette, combine the orange juice and remaining ingredients in a small bowl, and stir well with a whisk. Pour the vinaigrette over the salad, and toss well.