Place the biscuit in a form 15 cm in diameter, cover the bottom with baking paper, how to do this – unfasten the ring, cover the bottom with paper, put the ring on and fasten the form, cut off the excess paper. This way the ring will stick tightly to the bottom of the mold, which is important when baking cheesecake.
Clean the remaining biscuit from the crust and process it into crumbs (using a blender or grater). Place in a container with a lid, so that the crumbs do not dry out.