Preheat the oven at 180 degrees Celsius.
Crumble the biscuits and pour in a bowl.
Add the salt, flour, baking powder, sugar and the butter and stir until crumbly.
Press half of the crumbles on the bottom of a rectangular baking form.
In a bowl mix together the cream cheese with the condensed milk. Add the lemon juice and mix.
Add the egg yellows one by one while stirring.
Pour the mixture on the cake bottom.
Sprinkle the rest of the crumbles on the filling.
Place in the oven for 20-25 minutes.
Take out the cake and let it cool down. Cut in small squares before serving.