Mix flour and egg with enough water to make a soft dough; kneed well. Roll out on floured board until thin. Cut into squares.

For Cheese filling mix:
1/2 cup dry cottage cheese
1 egg yolk
1 teaspoon butter
pinch salt

For potato filling mix:
1 large potato cooked and mashed
1 tablespoon butter
(Optional-grated cheese to taste)

Place 1 teaspoon filling on each square. Fold in half, making a triangle. Pinch edges well to keep filling inside. Drop into boiling salted water and cook until they rise to surface. Cook 5 minutes longer. Rinse in colander with hot water. Drain. Pour melted butter over pirohy and serve.

Lekvar may be used as filling. Cooked sauerkraut may also be used as filling. Drain and rinse sauerkraut in cold water. Brown diced onion in shortening, add sauerkraut. Cook for a few minutes.