Step 1

Place mashed potatoes in a large bowl.  Add egg, salt and flour as needed to form a smooth, cohesive dough without overworking it (the dough will be tough if overworked).

Step 2

Bring a large pot of salted water to a boil.

Step 3

Lightly flour your work surface and hands and roll pieces of the dough into "ropes" about 1/2 inch in diameter. Cut at an angle into approximately 1 inch to 1-1/2 inch pieces. Repeat with remainder of dough.

Step 4

Drop the cut dumplings into the boiling water. Avoid crowding and work in batches if necessary. Return the water to boiling, reduce to slow boil and cook 2 - 5 minutes, testing for desired doneness.

Step 5

Remove cooked dumplings to a colander and drain.

Step 6

Prepare topping by melting the butter in a small fry pan. Add the breadcrumbs and fry for 3 - 4 minutes or until golden brown.

Step 7

Transfer drained dumplings to a serving dish and sprinkle the buttered breadcrumbs on top.