Preheat the oven to 200. Season about 800g butterflied leg of lamb (obviously you will have plenty remaining) with salt and pepper and drizzle with a little olive oil. Roast in the oven for 40 minutes. Rest for 10 minutes, loosely covered in foil. Slice the lamb into thin strips and set aside.
Mix all the ingredients for the marinade together in a bowl and set aside.
Rinse your No Calorie Noodles with plenty of cold water, drain and then pat dry with kitchen towel.
Mix the No Calorie Noodles with the chopped tomatoes, avocado, and lamb and then toss together with the marinade.