Preparation: 20 minutes   Cooking time: 45 minutes   Total: 1hour and 5 minutes Ingredients Cake: 4 medium eggs; 1 teacup of sugar; ¾ teacup of oil; 2 tablespoons of lemon juice 1 lemon (use the zest); 1 teacup of milk; 2 teacups of all-purpose flour; 3 ½ teaspoons of baking powder. Topping: 1 cup of milk; 2 tablespoons of custard powder; 2 tablespoons of sugar; A pinch of salt; A piece of lemon peel. Preparation Cake Preheat the oven at 18 0 ⁰ c and grease a tin with butter and all-purpose flour; Pick two bowls and separate the eggs. In one bowl put the yolks and in another put the whites; Beat the whites with 1 teaspoon of baking powder until peak form and put it on the fridge; In the second bowl add the sugar and mix it until it turns white-yellow color; Add oil and the lemon zest. Mix for 5 minutes; In a pan pour the milk and the lemon juice. Heat over medium heat and when it starts boiling turn it off; Add...