Combine the apple cider mix, brown sugar, cinnamon in a small bowl. Rub the pork loin with olive oil and then rub the spice mixture over the loin. Season with salt and pepper (about a half teaspoon of each). Place in the crockpot.
Add the chopped onion, minced garlic and quartered apples around the pork in the slow cooker. Pour the water over the vegetables.
Cover and cook on low for 6–8 hours or on high for 3–4 hours until tender.
Remove from the crockpot. Cover with foil and rest for 10 minutes.
If you're making the optional gravy (which I really recommend!) Remove the pork is from the crockpot and cover with foil. Leave the apples, onion and sauce in the cooking vessel.
Whisk together the cornstarch and cold water until smooth. Pour into the slow cooker. Increase the heat to high, stirring occasionally until the sauce thickens.
Serve the gravy drizzled over the sliced pork, garnish with minced parsley. Serve and enjoy!
Notes
¼ teaspoon fresh grated nutmeg (optional) adds great fall flavor.*You can substitute apple juice or apple cider for the apple cider mix.For even more flavor, sear the pork loin on all sides before adding to the crockpot.You can cook this on high, but I recommend cooking it on low. The meat will have a better texture and be more tender.