Preheat oven to 350°F. Grease an 8-inch round baking pan. Line the bottom of the pan with a round of parchment paper.

In a heat-proof bowl (preferably stainless) beat together whole eggs, egg yolks, sugar and salt, using an electric hand mixer at high speed. Place bowl over pan of simmering water and continue beating with the electric mixer until the mixture is warm. Remove bowl from water. Continue to beat until mixture is cooled and increased in volume This will take 5-7 minutes, and the batter should be thick and leave a trail when the beaters are lifted from the bowl.

Sift together cake flour, cornstarch and cocoa. Sift dry ingredients over the beaten egg mixture, gently folding with a rubber spatula. Pour batter in prepared pan.

Bake for 30 minutes or until cake springs back when touched with finger. Cool in pan on wire rack for 10 minutes. Loosen edge with knife and invert cake onto a rack. Carefully remove paper. Place another rack on cake and invert again. Cool completely.

Combine sugar and water in saucepan over medium heat. Heat to a boil. Remove from heat and let cool. Stir in liqueur.

Let raspberries thaw in the bags. Combine raspberries (along with whatever juice/ liquid is in the bags) and sugar in a saucepan. Heat to a boil and simmer 10 minutes. Strain mixture through a fine-mesh sieve into bowl. You should have about 2 cups of raspberry pulp and juice combined. Cool to room temperature.

Combine liqueur and gelatin in heatproof cup and let stand 5 minutes. Heat in microwave for 10 seconds or until gelatin turns to liquid. You can also melt it in a saucepan on the stovetop if you don’t have a microwave.

Whisk into raspberry purée.

Beat heavy cream in bowl until stiff peaks form, using electric mixer at high speed. Fold raspberry mixture into whipped cream.

Level cake with a serrated knife then cut genoise horizontally into two equal layers. Place one 8-inch layer, centered, in the bottom of the 9-inch spring form pan, cut side up. Brush with half of raspberry syrup. Spread with ½ cup of the chocolate-hazelnut spread.

Pour half of the raspberry Bavarian cream over and around the sides of the cake. Lightly drop the pan on the counter top one or two times to ensure the cream settles into the empty ring around the genoise. Top with other cake layer, cut side down. Brush with remaining syrup. Spread the remaining ½ cup chocolate-hazelnut spread over the genoise. Cover with remaining raspberry Bavarian cream. Drop on counter top as before. The cream should completely fill the 9-inch pan with a little left over. Level the top with a large off-set spatula. Cover and refrigerate until mixture sets, at least 2 hours.

Run a small knife between dessert and pan. Remove spring form collar. Spread 1 cup whipped cream on side of dessert. Pipe a decorative border of whipped cream around the edge of the cake with the remaining cream, using a small star decorator tip (if desired). Press chocolate curls or shavings into sides of the cake. Arrange raspberries in a concentric circle around the top edge of the cake. Sprinkle center with chocolate curls.