Brown your sausage and diced onion in a large non-stick skillet over medium-high heat. At the end of cooking time add your minced garlic for 30 seconds.
Add your ravioli to a crockpot and then add your cooked sausage mixture on top.
Mix together chicken broth, heavy cream, corn starch, sundried tomatoes, red pepper flakes, garlic powder and Italian seasoning, and once well mixed add to the crockpot.
Cook on low for 3-4 hours, or high for 2 hours. Mix halfway through cooking time.
Once cooked, add cheese and spinach. Mix well and enjoy.