Prep the potatoes
Scrub the sweet potatoes well and dry them. Poke each potato a few times with a fork so steam can escape. Rub the skins lightly with a drizzle of olive oil and a pinch of salt.
Air fry the potatoes
Preheat the air fryer to 380°F (190°C). Place the potatoes in the basket without crowding. Air fry 35–45 minutes, flipping halfway, until a fork slides easily into the flesh. Check at 30 minutes if your potatoes are smaller.
Make the filling while the potatoes cook
Heat 1 tbsp olive oil in a skillet over medium heat. Add minced garlic and sauté 30–45 seconds until fragrant. Add the spinach and toss until wilted, about 2–3 minutes. Remove from heat, season with salt and pepper, and let cool slightly. Stir in the ¼ cup vegan feta.
Stuff the potatoes
When potatoes finish, let them rest 3–5 minutes. Slice each potato lengthwise, open it slightly, and use a fork to fluff the interior and create a little well. Spoon in the spinach-feta mixture, pressing gently so the filling nests in the sweet potato.
Finish & serve
Garnish with herbs, lemon zest, or another crumble of vegan feta. Serve hot.
Bold pro tip: If you want melty-looking feta, pop the stuffed potatoes back in the air fryer at 350°F for 3–4 minutes. The feta won’t melt like dairy, but it warms and softens nicely.