Lemon Butter - cooking recipe

Ingredients

grated rind of 1 lemon
juice of 1 lemon
pinch of salt
3/4 c. sugar
1 egg, beaten
lump of butter

Preparation

Put first four ingredients in double boiler.
Stir, add egg, put on medium heat, stir constantly and cook until smooth.
Take off heat and add butter.
Stir.
Chill.
Pour in small jelly glass.