Preheat oven to 350°. Place pie shell on a baking sheet.
Arrange ham and 1 cup cheese over the bottom of the pie shell.
In a medium mixing bowl whisk together half and half, eggs, parsley, salt, pepper, mustard, paprika, garlic, onion powder and nutmeg. Mix until fully combined.
Pour evenly over ham and cheese. Top with remaining ½ cup cheese.
Bake for 30 minutes. Check edges for browning and cover loosely with foil, if needed. Continue to bake another 15-20 minutes or until set when gently shaken.
Let stand on a baking rack at least 30 minutes prior to cutting.