In a large skillet over medium heat, begin browning the pork sausage.
When sausage is about halfway cooked, add the diced onion and continue to cook until sausage is fully browned.
Add garlic and celery, and continue to sautee for 2-3 minutes.
Remove skillet from heat, and add meat and veggie mix to crock pot.
Add all remaining ingredients to crock pot, lightly stir, cover, and cook on high for 6 hours or on low for 10 hours.
Enjoy topped with shredded Parmesan cheese!