Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.
In large skillet, heat oil over moderate heat. Remove casing from sausage and add to skillet. Cook, breaking up the meat, until brown. Add garlic and red pepper and cook, stirring until garlic is golden brown.
Add tomatoes and salt; bring to boil. Reduce heat and simmer 15 minutes. Add peas and mushrooms.
Add vodka and cream and bring to boil. Reduce heat to low and add pasta, toss for 1 minute. Stir in fresh parsley and serve!