Peel prawns down to the tail fins. Make a longitudinal incision in the back and remove any dark intestine with a sharp knife. Rinse shrimps cold and dab dry. For the marinade, mix coriander, chilli and 1 tbsp. oil.
Mix with the prawns. Cover and chill for at least 30 minutes. Wash the cucumbers and slice lengthwise into fine slices. Mix with 1⁄2 tsp. salt. Leave to stand for about 10 minutes.
Peel the garlic for the foam. Wash the basil and shake dry. Chop both finely. Puree with mayonnaise and about 4 tbsp. water with a hand blender until foamy. Wash rocket and salad, spin dry.
Mix 2 tablespoons lime juice with 1 pinch of sugar. Fold in 2 tablespoons of oil. Season vinaigrette and basil foam with salt and pepper.
Heat 2 tablespoons of oil in a frying pan. Fry the prawns in it over a high heat, turning them over for 3-4 minutes. Reduce heat. Sprinkle with 1 tsp. sugar and caramelise lightly. Deglaze with 2 tbsp lime juice.
Cover and leave to stand for approx. 5 minutes. Season with salt and pepper. Dab cucumbers dry, mix rocket and salad with the vinaigrette. Serve with cucumbers, prawns and basil foam.