For a pretty presentation, arrange the toppings in little piles on top of the salad. Add dressing and toss at the table.
In a small bowl, whisk the EVOO, onion, and orange zest and juice; season the vinaigrette with salt and pepper. Place the lettuce in a large bowl. Arrange the remaining ingredients on top in organized piles. Season the salad and drizzle with the vinaigrette.