Remove sausage meat from casing by slicing open and scraping out contents.
In a large skillet, heat olive oil. Add garlic, diced green onion, shallot and sausage meat. Sauté for 3 minutes; add sundried tomatoes and all the seasonings. Sauté for 4 more minutes. Deglaze the pan with the port; add tomatoes and allow to simmer until liquid is reduced, 5-10 minutes.
Prepare pasta per package directions. Serve sauce over hot pasta; garnish with remaining green onion. Makes 4-6 servings.