Preheat oven to 375 degrees. Split the focaccia in half to make two slices. On one side of the bread, spread the olive tapenade and lay 3 to 4 tomato slices on top. On the other half, drizzle some olive oil and lay 5 to 6 slices of the proscuitto on top. Add 4 slices fresh mozzarella and 4 to 5 basil leaves. Add freshly ground pepper and close the sandwich. Place in the oven for 3 to 4 minutes or until the cheese begins to melt. Cut into 2 or 3 individual sandwiches and serve warm.