Start by draining the chunk tuna thoroughly; this prevents sogginess in your Air Fryer Tuna Cakes. In a large bowl, combine the tuna with eggs, seasoned breadcrumbs, mayonnaise, lemon juice, diced onion, salt, and pepper. Gently mix with your hands until everything is well incorporated but still holds together, ensuring a firm texture.

While your mixture rests, preheat the air fryer to 375°F. Then, spray the basket with cooking spray or brush with olive oil to prevent sticking.

With the mixture ready, take a portion and shape it into patties, about ¾ inch thick. Place up to four patties in the air fryer basket, leaving space in between for air circulation.

Air fry the patties for 12 minutes at 375°F, flipping them halfway through the cooking time. After cooking, use tongs to carefully remove the patties from the basket and let them rest for a minute before serving.