Anne Byrn and I were talking about Hummingbird cake, Red Velvet cake, and that famous Carrot cake from the Silver Palate cookbook as we noshed on a scone. “Holidays preserve what the everyday loses,” she suggested. More frighteningly: “Cakes wouldn’t even be around except for the holidays.” “Happy Holidays” has a whole new meaning for me! Sharing a scone at Dozen Bakery in Nashville is …