1. Place the thawed spinach in a kitchen rag or tea towel and twist to release as much moisture as possible. This is best done over the sink!
2. In a large bowl, stir together the ricotta, almond flour, spinach, parmesan, garlic, Italian seasoning, red pepper flakes, salt, and pepper.
3. Add the egg and work that in until well combined. Use a silicone spatula to work everything together like a dough.
4. Using about 2 tablespoons of the mixture at a time, form into balls and then flatten the balls into patties. You should get at least 12.
5. Preheat the air fryer to 400ºF (200ºC) and lightly grease the rack(s). Place the fritters in a single layer on the racks and brush lightly with melted butter or oil. If your air fryer is small, you may need to work in batches.
6. Air fry for 10 minutes, flipping over partway through and brushing the second side with butter or oil.
7. Serve with marinara or other favorite dipping sauces.