Knead ingredients to smooth dough, keeping half egg for glazing.
Butter a shallow 8" cake tin (1" deep) and press dough into it.
Brush surface with remaining egg, and with the back of a knife mark
squares on the top. Bake @ 350F for 30 mins - golden brown.
Whilst still hot press centre of cake down with back of spoon.
Let it cool. When firm to touch turn on to a wire rack.
(Soft inside, crisp outside).