Clean and wash the rocket. Wash and clean the tomatoes and cut them into 8 slices each. Wash chives and parsley and dab dry. Cut chives into small rolls. Peel and finely chop the parsley leaves. Mix quark, 1/2 tablespoon oil and herbs. Season to taste with salt, pepper and sugar
Peel garlic and dice finely. Peel prawns, remove intestines. Wash the prawns and dab dry with kitchen paper. Heat 2 tablespoons of oil in a large, coated frying pan. Fry the prawns for 4-5 minutes, turning them over. Add garlic after about 2 minutes. Remove and season with salt, pepper and lemon juice
Debark slices of toast. Spread 4 slices of toast with quark, cover each with 4 slices of tomato. Season with salt and pepper. Place rocket and 4 prawns on top. Place the remaining slices of toast on top and cut in half diagonally. Garnish with chives and parsley if necessary and arrange on a plate