We gave the rolled and rounded yule log a modern makeover. Airy and extra-soft, the meringue-based cake is prepared on a single sheet-pan and simply cut into four pieces for clean lines that make it easier to box up. Those intense, dark, chocolatey layers are best eaten slightly chilled, and the ganache base firms up when cold, so it’s solid and sturdy for a trip. And to take it over the top, how about some pistachio crumble?