Sofia's Potatoes

Preparation

1. 1.Boil the potatoes. Pass them through a food mill.
2. 2.Mix with 2 tablespoons of margarine, the flour, and the egg yolk (if it's too soft, add more flour).
3. 3.Don't let it sit too long. Fry while still warm (put 1 or 2 in hot oil to fry; if they fall apart, add more flour).