Combine all the ingredients for the dressing, except the oil, in a ceramic or glass bowl and allow to sit for 30 minutes to blend the flavors. Whisk in the oil in a slow stream and mix until creamy.
Combine the fruits and vegetable in a bowl. Pour the dressing over the top and gently toss to mix.
Line plates or a serving platter with the lettuce and top with the fruit mixture. Garnish with the pomegranate seeds and serve.