1Add ground beef, Italian sausage (casings removed), eggs, chopped parsley, garlic powder, sage, bread crumbs, Parmesan cheese, salt, and pepper into a large bowl.
2Mix all the ingredients thoroughly by hand.
3Form the meat mixture into tiny meatballs.
4Heat olive oil in a pan and add the meatballs to fry until browned.
5Dice the yellow onion.
6Dice the garlic.
7Sauté the diced onions and garlic in the pan until fragrant and soft.
8Chop the celery.
9Dice the carrots.
10Add the chopped celery and diced carrots to the pan with the onions and garlic, and sauté.
11Deglaze the pan with white wine.
12Add chicken stock and beef stock to the pan.
13Integrate the orzo pasta and add a bay leaf to the soup.
14Let the soup simmer for a few minutes.
15Add the fried meatballs to the simmering soup.
16Add chopped spinach to the soup and allow to simmer for another few minutes.