Make the olive tapenade by combining all tapenade ingredients. Let marinate in the refrigerator for at least 24 hours.
When ready to assemble the sandwiches, slice the loaf of bread horizontally in half.
Spread a layer of olive tapenade on the bottom half.
Layer meats and cheeses as desired.
Top with another layer of olive tapenade and the top half of the bread.
To serve, cut in quarters.