Mushroom Piroshkie(Pierogi) Appetizers   T-R-L  | 
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                                            Prep Time: 30 Minutes Cook Time: 15 Minutes  | 
                                            Ready In: 45 Minutes Servings: 40  | 
                                         
                                        
                                     
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                    Russian version of Pierogi apps. Quick, easy, and  freezable ! The size of the piecrust pkg is a guess. I'd use something like Jiffy piecrust mix. Also, if you have a potsticker former, you can use it to cut and fold these. Ingredients: 
                    
                        
                                                1/2 cup finely chopped onion  |  
                                                1/4 cup butter or 1/4 cup margarine  |  
                                                1 (8 ounce) package fresh mushrooms, finely chopped  |  
                                                3/4 teaspoon salt  |  
                                                1/4 teaspoon black pepper  |  
                                                1 hard-boiled egg yolk, chopped  |  
                                                1 (8 ounce) package pie crust mix, crumpled (or 2 pie crust sticks)  |  
                                                1/2 cup sour cream  |  
                                                
                     
                    Directions: 
                    
                        
                            
                                1. Preheat oven to 400ºF. 2. In medium skillet, saute onions in butter just until tender. 3. Add mushrooms; saute 3 minutes. 4. Stir in salt, pepper, and egg yolk; cool. 5. In medium bowl, combine pie crust mix and sour cream; mix until ball forms. 6. Divide in half; roll half lightly on floured board to 1/8-inch thickness. 7. Cut into rounds with 3-inch cookie cutter. 8. Spoon about 1 tsp filling onto half of circle. 9. Moisten edges of pastry with water; fold half circle over and press edges with fork. 10. Repeat with remaining pastry and filling. 11. Place on ungreased cookie sheets. 12. Bake for 15-18 minutes or until light golden brown. 13. Serve hot. 14. TO MAKE AHEAD:. 15. Piroshkies can be frozen on cookie sheet before baking, then place in plastic bags. 16. Bake at 400 degrees F for 15-18 minutes.                              | 
                         
                         
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