Sicilian Cassata Cake

Ingredients

• 4 eggs separated
• 1 2/3 cups caster sugar
• 1 teaspoon vanilla essence
• 1 lemon
• 4 tablespoons boiling water
• 1 pinch salt
• 1 1/4 cups plain flour
• 5 tablespoons potato starch
• 1 teaspoon baking powder
• 2 7/8 cups ricotta cheese fresh
• 3 1/3 cups caster sugar
• 1/2 teaspoon vanilla essence
• 3 1/2 ounces candied orange peel
• 9/16 cup dark chocolate chips
• 1 1/4 cups water
• 1 cup sugar
• 1/2 glass marsala or your sweet liquor of choice
• 9/16 pound marzipan / almond paste
• 2 1/2 cups icing sugar
• 3/4 cup water
• candied fruit orange peel, pumpkin peel, cherries, etc. to decorate