Bored with your usual salad makings? Remember, your primitive ancestors dined on hundreds of different bitter greens. Here's an easy way to introduce interesting, colorful greens into your salads because, as you know, more bitter, more better! Also, for a difference, serve the salad the authentic way, by placing each green on one-third of a large salad plate, like slices of pizza. Drizzle the dressing over the salad and top with shaved Parmigiano.