A bask soup that sure hits the spot on a chilly day.
Dice the potatoes and onions and cook until soft in water to cover. Do not drain. Mix the flour into cold milk and add to the onion-potato mixture. Simmer until the flour is cooked and the mixture has thickened. Add salt, pepper and butter. Remove from heat.
Beat the eggs until light yellow. Dribble the soup into eggs, stirring all the while. Do not boil after the eggs are added, or the soup will curdle.