If using turkey sausages, remove the casings and break up the meat. If making your own sausage, mix the ground turkey with fennel, garlic powder, salt, and pepper in a bowl, then break it into chunks.
In your slow cooker, add the sausage (pre-cooked or raw), garlic, onions, carrot, celery, Italian seasoning, chicken broth, tomatoes, and chickpeas. Stir to combine.
Set the slow cooker to high for 6 hours or low for 8 hours. Walk away and let the magic happen!
About 5 minutes before serving, stir in the diced red pepper and chopped kale. Let them sit for 3-4 minutes until tender but still vibrant.
Ladle the soup into bowls, serve hot, and enjoy!