The basis of a good soup - especially a simple soup such as this - is a good stock. The soup should be made with a white stock, that is, water in which a chicken, ham or bacon has been boiled. Alternatively, stock can be made from a ham bone or chicken carcass boiled with a few root vegetables and herbs as available, and an onion. The stock should be drained, allowed to cool and the fat removed from the surface.
6 medium potatoes
2 medium onions
3pt/6 cups stock or milk and water mixed
salt and pepper
Peel and dice the potatoes and chop the onions. Melt the butter and gently cook the onions and potatoes in a covered saucepan until soft but not coloured. Add the liquid, adjust the seasoning to taste, sieve if wished and serve in bowls decorated with a little chopped parsley.