For the last few weeks, we’ve been concentrating on a whole slew of savory dishes that celebrate Spring.  Today we thought we’d delve into something on the sweet side, and indeed, we have settled on a well-known dessert that should be a staple in everyone’s kitchen.  I asked Chef Jerry Pellegrino, where would the Blues be without mention of the good old Jelly Roll?  It would be a poorer place, he replied.