Remember that it is not necessary to use the same type olives for tapenade. On the contrary, if you mix kalamata, black and green olives together, the taste will be even brighter. If the tapenade seems thick to you, you can always fix it by adding a little bit of olive oil. A thick tapenade is convenient for a bruschetta, and in a thinner one it is so delicious to dip a ciabatta or a fresh baguette.