Remove broccoli leaves, and cut off tough ends of stalks; discard. Wash broccoli, and cut into spears. Arrange broccoli in a steamer basket over boiling water. Cover and steam 6 minutes or until crisp-tender. Place in a serving bowl; keep warm.
Heat oil in a small saucepan over medium heat. Add green onions and next 3 ingredients, and sauté 3 minutes. Remove from heat; add vinegar and remaining 4 ingredients, stirring with a wire whisk until blended. Drizzle over broccoli, tossing gently to coat.