1. Combine the olive salad ingredients and refrigerate 24 hours in advance to allow the flavors to meld and mellow.
2. To make the sandwich, cut the bread in half, layer on half the meats and cheeses; spoon half the olive salad on top.
3. Layer the remainder of the meats and cheeses and top with the remainder of the olive salad.
4. Slice into wedges and serve.