1Cook spaghetti as directed on package in 4-quart Dutch oven or saucepan; drain and return to Dutch oven.
2Meanwhile, cook sausage, fennel and garlic in 10-inch nonstick skillet over medium heat, stirring frequently, until sausage is no longer pink in center; drain. Remove sausage from skillet.
3Place sugar snap peas, mushrooms and broth in skillet. Heat to boiling; reduce heat to medium-low. Simmer uncovered 3 to 4 minutes, stirring frequently. Stir in tomatoes and green onions; cook over medium heat, stirring frequently, about 2 minutes. Add sausage and parsley; cook 1 minute longer or until hot.
4Add sausage mixture to spaghetti in Dutch oven; toss gently to mix.