Heat 2 tablespoon of the olive oil in a pot. Brown the sausage slices on both sides. Remove the sausages from the pot and refrigerate.
Add the remaining 1 tablespoon of olive oil to the pot. Sautee the onions, carrots, celery and parsnip for 5 minutes.
Add in the minced garlic, diced tomatoes, zucchini, and water or broth. Bring the soup to a boil.
Lower to a simmer and cook for 25-30 minutes.
Toss in the pasta, spinach and sausages. Cook for an additional 15 minutes. Add more water or broth as needed.
Season the soup to taste.