Chop the crackers, add the melted butter, knead with your hands, cover withthe mixture the tart pan, and poke the bottom with a fork.In a bowl, pour the condensed milk, the lemon juice, 1 egg and 5 egg yolks, stirring welluntil the mixture is smooth. Put it into the tart pan and take it to the oven for 30 minutes or until cooked and golden. Remove from the oven and let cool. Separately, beat the 5 egg whites with the remaining sugar and spread it over the cream and take it back to the oven to 200 º C till it has a golden look on top. Remove from oven, let cool completely and reserve in refrigerator until serving time.