Florence Kreisler Greenbaum. The International Jewish Cookbook, 1919
Hash may be made with one or many vegetables and with or without the addition of meat and fish. Potato is the most useful vegetable for hash, because it combines well with meat or other vegetables. The vegetables must be chopped fine, well seasoned with salt and pepper, and parsley, onion, chives or green pepper if desired, and moistened with stock, milk or water, using a quarter of a cup to a pint of hash. Melt one-half tablespoon of butter or savory drippings in a pan; put in the hash, spreading it evenly and dropping small pieces of butter or drippings over the top. Cover the pan; let the hash cook over a moderate fire for half an hour; fold over like an omelet and serve. If properly cooked there will be a rich brown crust formed on the outside of the hash.