This section is from the book "The White Ribbon Cook Book", by Kathryn Armstrong. Also available from Amazon: The White Ribbon Cook Book.
The liquor in which a leg of mutton, piece of beef or old fowl has been boiled, barley, vegetables chopped small, a cup of rough oatmeal mixed in cold water, salt and pepper to taste.
Add to the liquor some barley and vegetables, chopped small, in sufficient quantity to make the broth quite thick. The necessary vegetables are carrots, turnips, onions and cabbage, but any others may be added; old (not parched) peas and celery are good additions. When the vegetables are boiled tender add the oatmeal to the broth, salt and pepper to taste. This very plain preparation is genuine Scotch broth as served in Scotland; with any coloring or herbs, etc., added, it is not real Scotch broth. It is extremely palatable and wholesome in its plain form.
 
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