For marinade, in a medium bowl, combine soy sauce, cornstarch, vinegar, ginger, crushed red pepper, and garlic. Trim fat from meat. Cut meat across the grain into 1/8-inch-thick slices. Add meat to marinade; toss to coat. Cover and marinate at room temperature for 10 minutes. Drain meat, discarding marinade.
Meanwhile, cut broccoli florets from stems. If desired, peel stems. Cut stems into 1/4-inch-thick slices.
In a wok or large skillet, heat 1 teaspoon of the oil over medium-high heat. Add meat; cook and stir in hot oil for 2 to 3 minutes or until slightly pink in center. Remove meat from wok or skillet.
Add the remaining 1 teaspoon oil to hot wok or skillet. Add broccoli and carrots; cook and stir for 1 minute. Add beef broth: cook and stir for 5 to 7 minutes or until vegetables are crisp-tender, stirring to scrape up any browned bits from bottom of wok or skillet. Return cooked meat to wok or skillet. Add green onions; heat through. Serve immediately over hot cooked spaghetti squash or pasta.