On a large platter, place the romaine lettuce and top decoratively with the rest of the ingredients. Season with salt and pepper, to taste. Drizzle with Lemon-Olive Vinaigrette and serve.
In a small bowl, whisk together the mustard, lemon juice, and vinegar. Drizzle in the olive oil and whisk to create an emulsion. Add the thyme, olives, and salt and pepper, to taste. Let sit at least 10 minutes to marry the flavors.