Filling: Mix ham, onion, tomato sauce, parsley flakes, pepper, mustard and horseradish. Set aside.
Pastry: Mix flour and salt. Mix in shortening only until mixture is crumbly. Add cold water and mix quickly. Let dough rest 15
minutes. Divide dough into 24 pieces; form into balls. Roll each ball out on a lightly floured surface to make a circle about 5"
in diameter, about 1/8" thick. Place about 3 Tbsp of ham mixture onto one half of each pastry circle. Fold other half of circle
over ham mixture. Seal edges by pressing with tines of fork.
To Freeze: Place in freezer safe container or wrap with freezer paper.
To Reheat: Preheat oven to 400 degrees. Place on cookie sheet and bake 45 minutes or until turnovers are lightly browned.