Clean, wash and drain the salad. Mix 3 tablespoons lime juice, vinegar and sugar. Season with salt and pepper. Add 4 tablespoons of oil. Wash, dry and halve the tomatoes. Cut off the end of the lemongrass. Cut lemon grass in half lengthwise and use as skewers.
Wash the scampi, dab dry and put 3 scampi on each lemongrass skewer. Sprinkle the scampi with 1 tablespoon lime juice and season with salt and pepper. Heat 1 tablespoon of oil in a pan. Fry the scampi skewers for about 2 minutes on each side. Arrange salad, tomatoes and scampi skewers on plates. Drizzle with vinaigrette and garnish with slices of lime