Which salad contains Giardiniera?

The Mediterranean with Shrimp Chopped Salad is the correct choice because it is traditionally garnished with Giardiniera, which is a pickled vegetable condiment originating from Italy. Giardiniera typically includes a mix of pickled vegetables such as peppers, carrots, and cauliflower, adding both flavor and texture to the salad. This condiment complements the salad's other ingredients, enhancing the overall Mediterranean flavor profile and providing a unique tangy element that balances well with the shrimp and other fresh components in the dish.

The other salads listed do not typically include Giardiniera as part of their ingredient structure, which is why they would not be the correct answer in this context. Each of those salads has its own distinct flavor profiles and ingredient combinations that set them apart from the Mediterranean with Shrimp Chopped Salad.