Preheat oven to 400°F/200°C.
Wrap the grated apples in a clean towel and squeeze out as much moisture as you can. THIS IS AN IMPORTANT STEP SO YOU DON'T GET SOGGY MEATLOAF.
To a large bowl add the ground pork, apples, onion, oregano, sage, egg, breadcrumbs, milk, salt and pepper. Mix until everything is well combined.
Add the meat mix to a 9 x 13. inch (23 x 33 cm) casserole dish and mold into a meatloaf shape, 10 inches long and 5 inches wideT (25 x 13 cm). Top with ketchup and pour beef broth to the bottom of the pan.
Cover with foil and bake for 30 minutes. Remove the foil and contine to bake for 30 more minutes, or until a thermometer when inserted into the center reaches 165°F/74°F.
Remove from the oven and allow to rest for 10 minutes before slicing and serving.
To make the gravy using cornstarch, strain through a sieve and add to a saucepan. Mix a little cornstarch with water and stir into the gravy, simmer until thickened. Using flour, mix a little flour in a bowl with a little of the warm gravy, pour into the pan and whisk bringing to a simmer until thickened.