Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a large bowl, combine the ground chicken, chopped spinach, Parmesan cheese, almond flour, egg, minced garlic, onion powder, dried oregano, salt, and black pepper.

Use your hands to mix the ingredients together until well combined. It’s important not to overmix, as this can make the meatballs tough.

Form the mixture into 1-inch meatballs and place them on the prepared baking sheet. You should end up with about 16 meatballs.

Bake in the preheated oven for 20-25 minutes, or until the meatballs are cooked through and lightly browned on the outside.

Remove from the oven and let cool slightly before serving.