In a large pot, heat 1 tablespoon olive oil over moderate heat. Add sausages and cook, turning occasionally, until browned and cooked through, about 10 minutes. Remove. when cool enough to handle, cut into 1/8 inch slices.
In the same pot, add 1 tablespoon oil and add onion and garlic, cook over medium heat, stirring occasionally until the onion is translucent, about 5 minutes. Add mushrooms and cook until golden, 5-10 minutes.
Add broth, seasoning and 2 tablespoons of parsley. Bring to a boil. Reduce heat and simmer, partially covered, for 15 minutes. Stir in the sausages and bring back to a boil. Add pasta, reduce heat and simmer until cooked through, about 3 minutes. Stir in remaining parsley.