Mushroom Piroshkies

1/2 c finely chopped onion
1/4 c butter
8 oz pkg muchrooms, finely chopped
3/4 t salt
1/4 t pepper
1 hard cooked egg yolk, chopped
Pastry (recipe following)

In a skillet, saute onion in butter until tender. Add mushrooms and saute 3 minutes. Stir in salt, pepper and egg yolk. Cool. Prepare pastry and divid ein half. Roll half on floured surface to 1/3" thinkness. Cut into rounds with 3" cookie cutter. Spoon about 1 t filling onto half of each circle. Mosten edges of pastry with water. Fold over half of each circle and press edges with fork. Repeat with remaining pastry and filling. Place on ungreased baking sheets. Bake at 400 for 12 to 15 minutes.

Piroshkies can be frozen on bakng sheets before baking, then placed in plastic bags. Bake at 400 for 15 to 18 minutes if frozen.

Pastry:
11 oz pkg pie crust mix
1/2 c sour cream

Mix together.