Preheat oven to 425°F. Gather the ingredients so you have everything close at hand on the counter or table.
Shred the mozzarella cheese. Place in a bowl and set aside until ready to use.
8 oz mozzarella cheese, shredded
Prepare the Pastry Shell
In a medium mixing bowl, combine all-purpose flour and kosher salt. Cut in vegetable shortening with blending fork until mixture resembles crumbs. Add water in two parts, until dough comes away from the bowl.
1 cup all-purpose flour, 1/2 teaspoon salt, 1/2 cup vegetable shortening, 1/4 cup cold water
On a lightly floured surface, roll dough to fit a 9+-in deep dish pie plate or quiche pan. Transfer to pie plate. Trim and flute edges.
Brown Sausage
In a large skillet, brown sausage over medium-high heat. Transfer to a bowl lined with paper towels to absorb the excess oil.
1 pound ground pork sausage
Allow the sausage (or bacon) to cool for a little bit. Sprinkle meat into the bottom of the pastry shell.
Prepare the Egg Filling
In a medium bowl, beat together large eggs, half and half, dried parsley, kosher salt, and freshly ground nutmeg.
Stir in shredded cheese. Pour into pastry shell over the sausage.
Bake in preheated oven on lowest rack, for 15 minutes. Reduce temperature to 375℉. Continue baking for 30-40 minutes or until a knife inserted in the center comes out clean. Let stand 10 minutes before cutting. Makes 6-8 servings.
Notes
*Sometimes I use bacon instead of sausage. Both are very good, so use whichever you desire. If using bacon, you will need 6-8 slices of thick-cut bacon. Once browned and cooled, break into bite-sized pieces.