How to Use a Mortar and Pestle: 12 Steps (with Pictures ...
Jul 20, 2018· Just bought a stone mortar and pestle with no instructions in the box. Grind some dry rice for about 15 minutes, then for 5 minutes with a little olive oil added to form a stiff paste. That will really polish up the inside, so removing the fine stone dust. Wash out with warm water and allow to air dry.