Heat sesame oil in sauté pan to smoke point, then add the beef. Sauté, turning frequently, until cooked nearly through. Pour off about half of excess oil. Add red peppers first, then remaining vegetables and sauté. Deglaze with lime juice, add soy, vinegar, stock, pasta, and 2/3 of the green onion and heat pasta through, tossing with liquid. Center pasta into the bowl with sauce, meat, and vegetables on it. Garnish with remaining green onions and bread sticks.