Make the broth – place chicken thighs, Italian sausage, ground beef, garlic, celery, carrots, and onions in the pot.
Add water and bring to a boil.
Once boiling, lower the heat and let it simmer for at least 4 hours.
While your broth is cooking, prep the other vegetables. Parboil them in salted water and set aside to cool.
When broth is ready, remove the meat with a straining spoon.
Bone the chicken and cut the sausage into pieces.
Add parboiled vegetables and meat back into the pot.
Bring to a boil and serve hot.
Top with parmesan cheese.