Cut the ripe avocado in half and remove the pit. Scoop out the flesh into a bowl and mash it until smooth. This will be the base of your fritters, so make sure there are no large chunks in the mix.
Mix in the Cheese, Egg, and Seasoning. Add the shredded cheese and your chosen seasoning to the mashed avocado. Mix well to ensure that the cheese and seasoning are evenly distributed throughout the avocado mixture. In a separate bowl, beat the egg. Add the beaten egg to the avocado mixture and stir until everything is well combined.
Form the Fritters. Divide the mixture into 8 even parts. Using a spoon, scoop up one part of the mixture and place it on the parchment-lined basket (or tray) of your air fryer. Shape it into a patty that's about 3-4 inches in diameter. For maximum crunch, use a spoon or fork to press the patty as thin as possible, to about ¼ inch thickness.
Preheat your air fryer to 390°F (195°C) for 3 minutes. Cook for 8-10 minutes, flipping halfway through using a thin silicone spatula, until the fritters are golden brown and crispy on both sides and edges.
Bake in the oven. Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper. Using a tablespoon, scoop the mixture onto the prepared baking sheet, spacing them apart. Flatten each fritter slightly with a fork. Bake for 15-20 minutes or until golden brown and crispy.