King'S Soup - cooking recipe

Ingredients

2 large onions
1 quart milk
1 tablespoon butter
salt
1 egg yolk

Preparation

Slice onions, add milk and butter. Salt and bring to a boil.
Cook slowly until onions are tender.
Beat egg yolk in a small bowl and add a small amount of hot soup, beating as you add it.
Pour mixture back into pot and cook a little longer.
Serve with cornbread.