In a sauté pan, cook the sausage till it is no longer pink, then place in the crock pot. Add the olive oil to the pan and cook the onions for 4 minutes, then add the garlic and cook for an additional minute. Add the onions to the crockpot.
Next, add the carrots, celery, crushed tomatoes, tomato paste, thyme, oregano and chicken broth to the crockpot.
Place the lid on the crockpot and set on high for 2 hours or low for 4.
Remove the lid and add the tortellini and kale to the crockpot. Place the lid back on and cook for an additional 30 minutes.
Add heavy cream and cook for another 10 minutes.
Serve each bowl of soup with a few thin slices of parmesan and a sprinkle of chili flakes.
ENJOY!