How to Make a layered lemon and almond semifreddo cake

This only looks difficult - it's actually not too hard. And the end result is so worth it! For this recipe, you will need: 1 3/4 cup sugar, 1/2 cup egg whites, 1 cup ground almonds, 3/4 teaspoon salt, 1 teaspoon vanilla, 5 egg yolks, 1 cup sugar, 1/2 cup of lemon juice and zest, 4 ounces butter, 3 eggs, 1 egg yolk, 1 1/3 cups heavy cream, 3/4 cup almond flour, 1/2 teaspoon bitter almond extract and 1 tablespoon of your favorite liqueur.