Soak skewers in water for 10 minutes minimum. Peel and devein the prawns, leaving the tails intact. Thread onto the skewers.
Combine the salt, pepper and lemon zest in a small bowl and sprinkle over the prawns. Brush a BBQ or grill plate with olive oil and cook the prawns over hight heat until cooked through. A few minutes each side is perfect.
Serve immediately drizzled with the lemon sesame dressing if using.
For the dressing:
Combine all ingredients in a small jar and shake.
If serving as a main course serve alongside rice and roughly chopped mint. As a starter simple enjoy as is, with or without the dressing.