Slice the eggplant into 1/2-inch rounds and sprinkle with sea salt to draw out excess moisture.
After 10 minutes, pat the eggplant rounds thoroughly dry with a paper towel to ensure they become extra crispy.
Whisk the egg in a small shallow bowl and combine the almond flour with garlic powder and dried oregano in a separate dish.
Dip each eggplant round into the whisked egg, then dredge it in the almond flour mixture until evenly coated.
Lightly coat the air fryer basket with olive oil and arrange the eggplant rounds in a single layer without overlapping.
Air fry at 400°F for 12 minutes, flipping the rounds halfway through until the coating is firm and golden brown.
While the eggplant is air-frying, brown the ground turkey in a skillet over medium heat and season with black pepper.
Stir the marinara sauce into the cooked turkey and simmer for 3 minutes until the sauce has thickened slightly.
Top each crispy eggplant round with a generous spoonful of the turkey-marinara mixture and serve immediately.