For maximum control over fermentation and proofing, nothing compares with fresh yeast. Because it consists of live cells in a nutrient medium, the best way to store the yeast is to cut it up into smaller pieces. Lay those pieces flat on a plate and freeze for 1-2 hours. Once the smaller pieces have hardened, transfer them to a bag and store in the freezer...

Home Style Poppy seed roll. 

Home Style Almond cake roll