Cut up 1 lb. of cold boiled potatoes, grate fine 1 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.
Source:
The Allinson Vegetarian Cookery Book
