Alcazar Layered Cake

Description
In Romanian: Tort Alcazar

Ingredients
Cream:
 * 6 egg whites,
 * 6 tablespoons sugar,
 * 8 oz/250 g ground walnuts,
 * vanilla,
 * oil;
 * 6 yolks,
 * 6 tablespoons sugar,
 * 8 oz/250 g butter,
 * 1/2 cup milk,
 * 1/4 cup coffee,
 * 1 tablespoon cacao,
 * 1/4 cup rum

Directions

 * 1) Whip the egg whites with the sugar and vanilla, add the walnuts and mix gently.
 * 2) Pour the mixture into a rectangular baking pan, (previously covered with parchment paper and lightly greased with oil), using a knife to spread it into a uniform layer.
 * 3) Bake at medium heat and when ready, invert onto a cutting board, moisten the paper and peel it off the cake.
 * 4) Cut lengthwise in two or three equal parts and spread the following cream on each of them.
 * 5) Mix the yolks with the sugar, add the milk, coffee, set on heat and keep stirring until the mixture starts to thicken.
 * 6) Do not let boil.
 * 7) Remove from heat, mix with cacao and let cool.
 * 8) Beat the butter until creamy, add the rum and mix with the boiled mixture; mix well and spread the cream on the sheets.
 * 9) Cover the cake with the same cream and garnish with ground walnuts.
 * 10) Serve cut in triangular pieces.