Preheat oven to 400°F. Prepare a baking sheet with parchment. Core the apples, & remove seeds in the middle. Remove apple flesh from the center, leaving about a ½ inch “shell” on the apple. Cut a small piece of the apple off the back of it so it can lay flat. Dice the apple flesh & set it aside.
To a hot skillet, melt butter, then add onion, & celery with a pinch of salt. Cook until beginning to soften, about 3 minutes, then add in apple pieces with garlic, sage, thyme, nutmeg & red pepper flakes. Cook until softened, about 5 minutes. Set aside to cool.
After the mixture has cooled, add to a large mixing bowl with ground pork, parmesan cheese, & the remaining salt and pepper. Mix until well combined. Separate the pork mixture into 8 equal-sized balls, & place in the hole in the center of the apples. (Each pork meatball should weigh about 3.25 ounces).
Bake for 20-25 minutes, or until pork reads at least 160°F inside. Garnish with a drizzle of oil, honey, flakey sea salt, fresh pepper, thyme, fried sage, & parmesan. That’s it! Enjoy!