Kashkaval refers to a Bulgarian sheep's milk cheese, which is sold either as a semi-firm cheese, with a texture similar to that of Cheddar, or as an aged, hard grating cheese. In both cases, this yellow cheese has a smooth, fine texture and a slightly tangy and nutty flavor with a hint of olive oil. Kashkaval may be used as part of a cheese platter, or grated into pasta, salads or pizzas. If not available, Kashkaval can be substituted with Caciocavallo, hard Parmesan or Provolone