Cut up potatoes, grate fine the onion and mix with these, add watercress, or mustard and cress, and boiled and sliced beetroot; flavour with pepper, salt, oil, and vinegar as above. Hard-boiled eggs may be cut into slices and added, and sliced apples or pieces of orange may be advantageously mixed with the other ingredients.
When oranges are added to a salad the onion must be left out.
Dr. Allinson's Cookery Book (1915).