Preheat oven to 425 degrees F
Chicken meatballs: Combine ground chicken, 1/4 cup Panko, Parmesan cheese, egg, oregano, thyme, salt and pepper and mix lightly.
Add remaining 1/4 Panko to a shallow dish.
Using a Tbsp, scoop the mixture into balls and roll in the Panko mixture on all sides. Place each meatball on a parchment covered sheet pan.
Place the pan into the oven and bake 12 minutes. Set aside to cool.
In a saute pan over medium high heat, add olive oil and then add the onions, celery, carrots and garlic. Continue to stir for 5 minutes until caramelized.
Add the vegetables into a slow cooker. Add beans, tomatoes, spinach, basil and the sausage.
Finally add in the chicken broth. Mix lightly and cook on low heat for 4 hours.
Add the cooled cooked chicken meatballs into a zip lock bag and refrigerate until soup is finished.
To serve: Place meatballs on a microwave proof plate and cook on high for 1 minute. Add 3 meat balls to each serving bowl. Ladle hot soup over the top. Then garnish with Parmesan cheese and chopped Basil, if desired.