In a skillet, cook the beef, mushrooms and onion over medium heat until meat is no longer pink; drain. Stir in the next eight ingredients. Bring to a boil. Reduce heat; simmer, uncovered, for 20-30 minutes.
Meanwhile, combine the flour, sugar and salt in a bowl. Cut in butter until crumbly. Gradually add water, tossing with a fork until dough forms a ball. Divide into fourths; flatten each portion into a circle. Cover with plastic wrap. Refrigerate for 30 minutes.
Line two 9-in. pie plates with pastry. Divide beef mixture between crusts. Roll out remaining pastry to fit tops of pies; place over filling. Trim, seal and flute edges. Cut slits in top.
Bake at 400° for 20 minutes. Reduce heat to 375°; bake 30-35 minutes longer or until golden brown. Let stand for 10-15 minutes before cutting. Yield: 2 pies (6-8 servings each).