Marinate the scampi with salt, pepper and 2 tablespoons lemon juice for 30 minutes.
Heat 2 tablespoons of oil and sesame oil in a wok, fry the drained scampi vigorously for 1-2 minutes, remove and keep warm. Add the rest of the oil and stir-fry the asparagus + carrots for 4 minutes or until cooked. Add the ginger, garlic and spring onion and cook for 3 minutes. Sprinkle with the sugar, add 1-2 tablespoons of lemon juice, soy sauce and sherry to taste. Simmer briefly and season with grated lemon zest, salt and pepper.