If you mean fat usage for cooking, etc. in Serbia it was mainly lard. Olives don't grow here and fat from milk is traditionally used to make "kaymak": https://

If you mean fat usage for cooking, etc. in Serbia it was mainly lard. Olives don't grow here and fat from milk is traditionally used to make "kaymak": https://en.wikipedia.org/wiki/Kaymak https://en.wikipedia.org/wiki/Kaymak