Use a box grater to shred 1 medium zucchini (use the largest hole setting). Transfer to a mesh sieve, sprinkle with ½ tsp salt, and let drain while you gather the rest of the ingredients.
Squeeze moisture out of the zucchini by pressing it down with a spoon, then transfer to a few layers of paper towels. Pat dry. You should be left with about 1 cup of shredded zucchini per zucchini.
Combine shredded zucchini with ½ cup flour, ½ tsp black pepper, and ½ tsp baking powder. Once fully coated, stir in 1 cup corn, ½ cup feta cheese, and 1 egg.
Drop balls of the dough into your air fryer in ¼ cup-sized scoops (you may need to work in batches). Lightly spray with oil and press with a spatula to create a thick puck.
Air fry at 375°F (190°C) for 10 to 12 minutes, or until golden brown and crispy. Serve warm with your favorite dip.
