Preheat the oven to 425 degrees F (220 degrees c).
Cook the potato and let them boil for about 5 minutes or until tender. After that drain, mash and set aside.
After that, add the pork and ground beef into a saucepan and crumble it, then add the chopped onion, garlic and water. Add the spices, tomato paste, black pepper, salt, mustard, parsley, sage and cloves. Cook over medium heat until the meat has a good browned color. Add in the mashed potato and quickly remove the pan from the heat.
Cover a pot or pie plate with the pie crust then fill it with the meat, then cover it with more pie crust. Make a few holes with a knife so the pie can vent steam. Press a fork against the edges of the pie crust and remove any excess dough.
Bake for 25 minutes or until it has a nice color. Enjoy or serve with a sauce!