Place chicken broth in large crock pot, cover and turn on high.
In a large skillet brown the Italian sausage and chopped bacon. Add minced garlic, onion, pepper flakes and celery seed. Cook until all meat is brown. Drain and put entire contents of skillet into crock pot with the broth.
Add sliced potatoes (NOTE: I cut the potato in half - length wise and then slice it) (hold off on mushrooms if you are using them instead of potatoes)
Cook on high for one hour, mix the contents carefully and then turn the crock pot down to low and cook for another 3 hours
Optional for Low carb recipe: After 3 hours add the sliced mushrooms.
Add evaporated milk or heavy cream to crock pot.
Cook for another hour on high.
Serve soup over some fresh spinach or kale. This soup is also delicious with shredded Parmesan cheese sprinkled on top.