Very old newspaper clipping
One cup sugar, one cup boiling water, butter the size of a walnut, juice and grated rind of one lemon, yolk of one egg (reserving the white for frosting), one tablespoonful of corn-starch, moistened with a little cold water.
Heat all, except the corn-starch together to boiling. Then stir in the starch, and let cook until thickens.
Have any rich crust ready baked in a pie-plate, pour in the filling, frost with the white of egg beaten to a stiff froth with sugar, and set in the oven to brown.