In a large bowl, combine the flour, cheese, garlic salt and oregano. Cut in butter until crumbly. Gradually add water, tossing with a fork until dough forms a ball. Divide pastry into thirds; set aside a third.
On a floured surface, roll out remaining pastry to fit a 9-in. pie plate. Transfer pastry to a pie plate. Trim pastry to 1/2 in. beyond edge of pie plate; flute edges.
For filling, coat veal cubes with flour. In a skillet, brown veal on all sides in butter. Add the tomatoes, tomato sauce, onion, cheese, sugar and seasonings. Bring to a boil. Reduce heat; simmer, uncovered, for 30 minutes.
Transfer into prepared crust. Top with cheese slices. Roll out remaining pastry. Cut into 2-in. circles. Place on top of filling. Bake at 400° for 30-35 minutes or until golden brown and bubbly.