Starting with the lettuce, layer all of the ingredients in a large salad bowl, then gently combine with salad tongs.
Add the salad dressing (if using) and season with salt and pepper to taste.
Serve the salad immediately.
Notes
To toast the pecans if necessary: Add the pecans to a dry skillet and heat over medium heat until toasted, about 3-4 minutes or until toasted. Be careful not to burn them.
If you may have leftovers or are delayed in serving, it is best if you reserve your salad dressing until right before serving. You’ll not be able to keep the salad after the dressing has been applied. If you prefer, you can dress individual plates of salad with the dressing.