01 - Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
02 - Heat 1 tablespoon olive oil in a skillet over medium heat. Add diced onion and minced garlic; sauté for 2 minutes until soft. Add chopped spinach and cook an additional 2–3 minutes until wilted. Set aside to cool.
03 - In a large mixing bowl, combine ground chicken, egg, grated Parmesan, almond flour, dried oregano, paprika, salt, and black pepper. Stir in the cooled spinach mixture until ingredients are fully integrated.
04 - With damp hands, form the mixture into 16 evenly-sized small meatballs and arrange on the prepared baking sheet.
05 - Brush or drizzle the meatballs with the remaining 1 tablespoon olive oil.
06 - Bake in preheated oven for 18–20 minutes, or until meatballs are golden and reach an internal temperature of 165°F (75°C).
07 - Allow meatballs to rest for 3 minutes before serving.