Whisk together the vinegar, mustard, garlic, 1/2 teaspoon salt and a few grinds of pepper in a large bowl. Slowly drizzle the olive oil in a steady stream, whisking vigorously, until the mixture is blended.
Add the lettuce and toss to coat in the dressing. Pile the lettuce on a large serving platter. Arrange the chicken, avocado, tomato, green pepper, bacon, red onion, egg and blue cheese in neat rows over the lettuce.
This recipe has been updated and may differ from what was originally published or broadcast.