Homemade Olive Garden Zuppa Toscana Soup: Crockpot recipe recommend cutting potatoes and Kale smaller. Also, potatoes take very long to cook. I would recommend using crockpot for hours or cooking potatoes part way first.
River North Paleo Girl: "Creamy" Crockpot Chicken and Tomato Soup. Changes I made: coconut milk, no jar tomato sauce. added 2 bay leafs, one finely chopped carrot, and used 4 cups chicken broth. And I cooked it stovetop-not crockpot.
Tomato Basil Parmesan Soup in the Slow Cooker (or on the stove-top)