Place the marinade ingredients in a bowl and whisk until combined. Add the steak and mix well. Cover and refrigerate for 1-2 hours. Prepare the salad. Bring the water to the boil in a saucepan. Break the noodles, add to the pan and cook for 2 minutes. Drain the noodles and rinse with cold water. Drain, then toss with the 1 tsp oil. Layer the lettuce, noodles, grated carrot and spring onion on a large platter. Prepare the dressing. Combine all the ingredients in a bowl and whisk until blended. When ready to serve, drain the meat. Heat the 2-3 tablespoon oil in a large frying pan and stir-fry the meat in batches over a high heat for 2-3 minutes. Place the warm meat on top of the salad. Sprinkle with the toasted nuts and coriander then pour over the dressing. Serve immediately.