Wash squash; cut in half lengthwise. Remove and discard seeds. Place squash, cut side down, in microwave-safe dish.
Cook in microwave on high power for about 5 minutes or until just tender.
Using fork, remove spaghetti-like strands from hot squash and place strands in large bowl. (Use oven mitts to protect hands.) Cover and keep warm.
To toast sesame seeds, heat wok over medium-high heat until hot. Add sesame seeds; cook and stir 45 seconds or until golden brown. Remove to blender. Add broth, soy sauce, sugar, sesame oil, cornstarch, red pepper flakes and Worcestershire sauce. Process until mixture is coarsely puréed.
Heat wok or large skillet over medium-high heat 1 minute or until hot. Drizzle vegetable oil into wok; heat 30 seconds. Add carrots; stir-fry 1 minute. Add bell pepper; stir-fry 2 minutes or until vegetables are crisp-tender. Add snow peas; stir-fry 1 minute. Stir sesame seed mixture; add to wok. Cook and stir 1 minute or until sauce is thickened.
Pour vegetable mixture over spaghetti squash and mix well. Add peanuts; toss well.