Freda R. Lavine, Recipes Tried and True — Sauces for Fish… (1922)
“ EGG SAUCE 2 hard boiled eggs, 2 tablespoons butter, 1 tablespoon flour, 1 cup boiling water. When cold, chop egg fine: melt butter, mix flour; pour in boiling water and add eggs. Cook until thick, and serve plain or on toast. ”
