In a skillet over medium heat, cook the breakfast sausage until crispy and browned, about 5-7 minutes.

Sprinkle in the all-purpose flour and stir well, allowing it to absorb the fat for about 1-2 minutes.

Gradually whisk in the whole milk, bringing the mixture to a simmer until thickened, approximately 3-5 minutes.

Season with seasoned salt and black pepper to taste, then set aside to cool slightly.

In another bowl, whisk the large eggs until combined, adding a pinch of salt.

Heat a nonstick skillet over medium heat, add a touch of butter, and pour in the egg mixture.

Stir gently, cooking until the eggs are softly set and slightly runny, about 3-4 minutes.

Remove from heat and set aside to cool slightly before assembling the Savory Breakfast Pop-Tarts.

In a large mixing bowl, combine the all-purpose flour and salt, creating a well.

Cut in the vegetable shortening and cold butter until the mixture resembles coarse crumbs, about 5 minutes.

In a separate bowl, whisk together the egg, white vinegar, and cold water, then pour this mixture into the crumb mixture.

Stir until just combined, then form the dough into a ball and refrigerate for at least 30 minutes.

On a floured surface, roll out the chilled pastry dough to an ⅛-inch thickness.

Use a sharp knife or pastry cutter to cut the dough into 3x4-inch rectangles; you should have enough for six pop-tarts.

Preheat your oven to 375°F (190°C).

On half of the rectangles, brush the edges with egg wash to create a seal.

Spoon a few tablespoons of the sausage gravy and scrambled eggs onto the center of each rectangle.

Cover each with a second rectangle, then crimp the edges with a fork to secure.

Transfer the assembled Savory Breakfast Pop-Tarts to a baking sheet lined with parchment paper.

Brush the tops with additional egg wash for a golden sheen.

Bake in the preheated oven for 25-30 minutes or until the pop-tarts are golden brown and flaky.

Once baked, remove the Savory Breakfast Pop-Tarts from the oven and allow them to cool on the baking sheet for about 5 minutes.

Serve warm, and enjoy the delightful flaky pastry filled with hearty sausage and scrambled eggs.