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1
The day before assembling the cake, make the meringue layers. Cut out TWO-11-inch circles from parchment or freezer paper; grease well with butter and sprinkle lightly with flour.
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2
Preheat the oven to 250u00b0F Fold the rim of the baking circles slightly upward.
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3
In a large bowl, beat the egg whites, cream of tartar, and vinegar together until the whites hold a stiff peak. Add the superfine sugar, a few Tablespoons at a time, beating until the mixture is stiff and glossy. To make superfine sugar blend in the blender until it is superfine.
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4
Gently fill each circle with half the meringue mixture, spreading evenly with a rubber spatula. Bake until the meringues are light golden and dry, 1 hour.
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5
Invert the meringues onto a plate and peel off the parchment paper. Leave in a dry spot overnight.
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6
The next day, preheat the oven to 350u00b0F Line the bottom a 10-inch sprinform pan with parchment or freezer paper. Lightly butter the paper and sprinkle lightly with flour.
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7
To make the walnut chocolate layer, in a large bowl, beat the egg yolks with the sugar until the mixture is pale yellow and forms a ribbon when the beaters are lifted.
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8
With clean, dry beaters, beat the egg whites in a separate bowl until soft peaks form. Gently fold one-third of the whites into the beaten yolks, then fold in the rest, alternating with the grated chocolate and walnuts.
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9
Fold in the bread crumbs, coffee, and lemon juice.
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10
Pour the batter into the prepared pan. Bake for 20 minutes. Reduce the oven temperature to 300u00b0F and bake until the cake tester comes out clean, another 20 to 25 minutes.
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11
When the cake cools off a little, remove the sides of the pan. Invert the cake and peel off the paper. Using a serrated knife, cut it horizontally into two layers.
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12
Whip the cream with the sugar, instant coffee, and rum extract until it holds stiff peaks.
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13
Place one of the walnut-chocolate layers, cut side up, on a cake platter and spread it with 1/2 cup of the red currant preserves and then with one-third of the coffee-flavored cream. Top with one meringue layer. Spread another one-third of the cream on the meringue layer and top with the second meringue layer. Spread the rest of the cream filling on the meringue. Spread the remaining preserves over the remaining walnut-chocolate layer. Place the walnut-chocolate layer, preserves side down, on top of the cream filling.
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14
You should have the following layers, starting at the bottom: walnut-chocolate, preserves, cream, meringue, cream, meringue, cream, preserves, walnut-chocolate.
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15
For the icing, melt the chocolate and shortening in the water in the top of a double boiler, over barely simmering water.
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16
Spread the top and sides of the cake with warm chocolate icing. Refrigerate the cake for at least 1 hour before serving. Serves 12.
