01 - Preheat the oven to 400°F and line a baking sheet with parchment paper.
02 - Heat 1 tablespoon olive oil in a skillet over medium heat. Add the onion and garlic; sauté for 2 minutes until softened. Stir in the chopped spinach and cook for 2 to 3 minutes until wilted. Remove from heat and allow to cool.
03 - In a large mixing bowl, combine ground chicken, egg, Parmesan, almond flour, oregano, paprika, salt, and black pepper. Fold in the cooled spinach mixture and mix until homogeneous.
04 - With damp hands, form the blended mixture into 16 equal-sized meatballs and arrange evenly on the prepared baking sheet.
05 - Brush or drizzle the remaining 1 tablespoon olive oil over the surface of the meatballs.
06 - Transfer the baking sheet to the oven and bake for 18 to 20 minutes, or until the meatballs are golden and reach an internal temperature of 165°F.
07 - Allow the meatballs to rest for 3 minutes before serving.