Preheat the oven to 350 degrees F.

In a small bowl, add the glaze ingredients: ketchup, brown sugar and apple cider vinegar. Stir until combined.

In a large bowl, add the meatloaf ingredients: eggs, milk, dijon mustard, worcestershire sauce, salt, and pepper. Whisk until the eggs are combined with the other ingredients.

Next, add the potato flakes and dried parsley to the meatloaf ingredients. Stir.

Add the ground pork and ground beef to the meatloaf mixture. Combine the pork and beef with a large spoon or clean hands to knead. Do not overmix the meatloaf; it will be tough. For this step, you can also use a stand mixer with a paddle attachment.

In a 9x13 inch baking greased dish, shape the meatloaf into an oval shape.

Brush half of the glaze over the meatloaf.

Bake meatloaf uncovered for 40 minutes in a 350 degree F oven. After 40 minutes, remove the meatloaf from the oven, brush on the remaining glaze, and continue to bake until the center of the meatloaf registers 165 degrees F, about 30-35 minutes. Remove from the oven and allow meatloaf to cool for 15 minutes before slicing. Serve immediately.