Defrost the frozen shrimps. Clean and wash the cucumbers and spring onions. Slice the gherkins thinly and cut the spring onions into diagonal rings.
Mix the asian sauce, vinegar and salt. Whip 3 tablespoons of oil into it. Mix with cucumber and spring onions. Cover and leave to stand in a cool place for about 30 minutes
Wash the shrimps and pat them dry. If necessary, cut into the back and remove the black intestine. Peel garlic and chop finely. Fry in 1 tbsp. hot oil. Add the prawns and fry for 1-2 minutes on each side. Season with salt and pepper. Sprinkle with lemon juice. Flavour cucumber salad again. Serve with the prawns and garnish with dill pennants