For the dough: Combine flour & butter in a large bowl.
Using a pastry blender or a fork, mix until the butter is evenly distributed among the flour.
Dissolve the salt & sugar in the water & stir into the flour mix.
On a lightly floured surface, lightly knead dough until it forms a ball, adding more water or flour if needed.
Cover the bowl with lid or plastic wrap & refrigerate 1 hour.
Roll dough out on a floured surface about 1/8 inch thick.
With a circle cookie cutter, cut out a 4-inch circle.
Continue until you have used all of the dough.
For filling: Put parsley, ham, breadcrumbs, cheese, sour cream, egg & pepper into a large bowl.
Mix well.
Put dough circles on a greased pan.
Put 2 Tbsp. of filling in center of each circle.
Fold dough circles in half, press & seal with a fork.
For egg wash: beat egg & add about 1 Tbsp water.
Brush egg wash on top of each empanada.
Bake at 375 degrees for 20 - 25 minutes, or until golden brown.