Partially freeze meat. Trim fat from meat. Thinly slice meat across the grain into bite-size strips.
Cook pasta according to package directions. Drain; keep warm.
Meanwhile, for sauce, heat oil in a large skillet or wok over medium-high heat. Add meat and onion. Stir-fry for 2 to 3 minutes or until done.
Stir in undrained tomato wedges, green beans, mushrooms, tomato paste, fennel seed (if desired), and pepper. Bring to boiling; reduce heat. Simmer, uncovered, for 7 to 8 minutes or until slightly thickened, stirring frequently. Stir in Parmesan cheese.
Arrange pasta on individual plates or a large platter. Spoon the sauce over pasta. If desired, sprinkle with additional Parmesan cheese. Makes 4 main-dish servings.