In a large saucepan (we use our dutch oven) saute onion on med-high heat until soft and translucent, about 3-5 minutes.
Note: I add the salt & pepper throughout the next few stages a little at a time (season as you go)
Add garlic, cook for one more minute
Add sausage, breaking it up into small chunks Saute until until it starts to brown a little bit, about 7-10 minutes.
Add red wine to deglaze the pan, scraping up all those delicious bits off the bottom of the pot.
Add remaining ingredients and simmer over med-low heat for about 45 minutes.
Serve over a bed of delicious pasta, top with fresh grated parmesan. Oh, and serve yourself up a glass of that red wine.