Beat the eggs slightly.
Add salt, water, and enough flour to make a medium-soft dough. Knead well by hand or in the food processor.
Divide the dough into 2 balls.
Cover with a moist towel.
Working quickly, roll out 1 ball of dough into a very thin rectangle.
Cut squares 3inches wide or any size you desire.
Place 1/2 teaspoon mashed potatoes on each square. Fold into a triangle and press edges together firmly, using water to seal the edges.
Drop into boiling water and cook, uncovered for 15 minutes.
Drain the kreplach. Saute in a skillet until browned.