It is recommended to use block whole milk mozzarella instead of fresh mozzarella. There is more moisture in fresh mozzarella and the salad could get soggy if you fresh mozzarella, especially if you are not serving it right away. If you are serving it right away you could use the block mozzarella which is shown in this salad, or boccocnicni, small little mozzarella balls. Just pat them dry with a paper towel first before adding them to the salad. The pine nuts add a little crunch to the salad. You can toast them in the oven for a few minutes on baking sheet if you prefer as well.