Heat 1 tbsp vegetable oil in a large pan over high heat. Add the capsicum and broccolini and cook for 5–7 minutes until tender and lightly charred. Remove and set aside.
Heat the remaining oil in the same pan. Add the beef and cook for 2–3 minutes, stirring, until browned and just cooked through.
In a small bowl, whisk together Lee Kum Kee Hot Chilli Soy Sauce and Premium Soy Sauce, rice vinegar, honey and lime juice.
In a large bowl, toss the noodles with the vegetables and dressing. Divide between bowls and top with the beef. Garnish with spring onions and coriander, then serve.