Preheat the oven to 375°F and line a baking sheet with parchment paper.
In a large bowl, combine the ground chicken, chopped spinach, almond flour, egg, onion, 2 minced garlic cloves, oregano, salt, and pepper. Mix until evenly distributed.
Divide the mixture into 8 equal portions and shape each into a small oval loaf. Place the loaves on the prepared baking sheet.
Bake for 22-25 minutes until the internal temperature reaches 165°F.
While the meatloafs bake, heat the olive oil in a small skillet over medium heat. Add the remaining 2 minced garlic cloves and cook for 1 minute until fragrant. Stir in the lemon juice and zest, then remove from heat.
Drizzle the warm sauce over the baked meatloafs and sprinkle with chopped parsley before serving.