Preheat oven to 400 degrees F. Line a baking sheet with parchment paper.
In a large bowl, combine ground chicken, spinach, lemon juice, egg, garlic, onion powder, paprika, salt, pepper, cayenne (if adding), and 1/2 cup pecans.
Mix all ingredients together until well combined.
Roll chicken mixture into meatballs - a little over 1 tablespoon.
Place reserved 1/2 cup pecans in a bowl. Roll meatballs in pecans to coat, and then place prepared baking sheet.
Bake for 20 to 30 minutes until meatballs are cooked through.