We love mixing oranges in our salad repertoire as you will find in fennel, orange and courgette salad recipe.  The two main varieties of oranges in Australia are navels and Valencias. As they grow during different times of the year, we get a great supply of sweet and juicy oranges all year round. For this recipe, I used navel oranges, but either one will be fine.  When cara cara oranges or blood oranges are in season, try those varieties as well. The reddish-pink flesh fruit will look amazing against the white buffalo mozzarella.