See Part One FOR CAKE: Preheat oven to 300 degrees. Butter llxl7-inch jelly roll pan. Line with parchment. Butter and flour parchment. Coarsely grind toasted almonds with flour in processor. Using electric mixer, beat yolks with 5 tablespoons brown sugar in medium bowl until slowly dissolving ribbons form when beaters are lifted. Stir in orange peel and vanilla extract. Using clean dry beaters, beat whites with cream of tartar and salt in large bowl until soft peaks form. Gradually add remaining 5 tablespoons brown sugar and beat until stiff but not dry. Fold whites into yolk mixture. Gently fold in almond mixture. Spread batter evenly in prepared pan. Bake until toothpick inserted into center comes out clean, about 30 minutes. Run small sharp knife around pan sides if necessary to loosen cake. Slide cake on parchment onto rack. Cool. Slide cake on parchment onto work surface. Loosen cake from parchment using heavy large knife as aid. Sift powdered sugar over cake. Invert onto cookie sheet. Sprinkle with powdered sugar and invert onto another parchment sheet. Using electric mixer, beat butter in large bowl until light and fluffy. Beat in Grand Marnier. Add pastry cream 1/4 cup at a time, beating after each addition until just blended. Spread half of buttercream over cake, leaving 1/2-inch border. Starting at 1 long side, roll up cake jelly roll fashion. Arrange seam side down on parchment. Set aside 1/2 cup buttercream; spread remaining buttercream over cake. Cut 2 inches off each end of cake, cutting on diagonal. Transfer cake to platter. Attach ends to top of cake, forming branches. Spread reserved 1/2 cup buttercream over cake ends and seams. Cover and refrigerate at least 1 hour to firm buttercream. (Cake can be prepared 1 day ahead. Cover and refrigerate. Let cake stand at room temperature 20 minutes before serving.) Arrange pine twigs on cake and on platter. Garnish with cranberries.