Soak a wooden skewer in cold water for ten minutes.
For the prawns, mix the olive oil, lemon juice and herbs together in a bowl and add the prawns. Toss to coat, then leave to marinate for 5-10 minutes.
Thread the prawns onto the skewer and cook on a hot chargrill pan for 1-2 minutes on both sides, or until the prawns are pink and cooked through.
For the salad, place the spinach in the centre of a serving plate.
For the red pepper dressing, place the red pepper under a grill unit's highest setting. Turn occasionally, until blackened all over. Allow to cool before peeling off the skin, then chop the flesh and place into a food processor along with the remaining dressing ingredients. Blend until smooth.
To serve, place the prawn skewer on top of the spinach and spoon the dressing around the edges of the plate.