Place the zucchini in a heat-proof, lidded container. In a medium saucepan, combine the white wine vinegar, sugar, ¼ cup salt, turmeric and mustard seeds and bring to a boil. Pour the hot mixture over the zucchini slices. Cover the container and refrigerate the pickles overnight.
In a separate container, combine the red wine vinegar, garlic, rosemary and red onion; cover and refrigerate overnight.
To assemble the salad, soak the radicchio in a large bowl of ice water for 1 hour. Drain, pat dry and reserve. Strain the red wine vinegar marinade through a fine-mesh strainer and set aside.
Gently toss the radicchio with the mint, parsley, ¼ cup bread and butter pickles, ½ cup of the red wine vinegar marinade and the olive oil, Parmesan and olives. Season to taste with salt and pepper and serve.