Ricotta Salata is an Italian cheese that is made from the whey part of sheep milk that is pressed, salted and aged, it has a firm texture and is absolutely delicious, but it's a little hard to find. Pecorino Romano can be substituted. Whichever cheese you use, shave it with a vegetable peeler for this salad, enjoy!
To toast your walnuts, place them in a dry skillet for 5 - 6 minutes, until fragrant or in a preheated 350-degree oven on a baking sheet for between 5 - 8 minutes.