Start by cooking the celery, onion and carrots in the two tablespoons of olive oil over medium high heat in a stock pot or Dutch oven until soft and translucent.
Add the sausage and cook until brown breaking it up as you go.
Then add in the tomato sauce ,chicken stock, water and heavy cream cover and simmer for 20 minutes. Then add the tortellini and simmer 10 minutes longer. Add the spinach and parmesan cheese the last 5 minutes
Salt and pepper to taste.