Clean and wash the salad, dab dry and cut into bite-sized pieces. Clean and wash spring onions and cut them into rings. Wash, clean and slice the tomatoes. Wash, clean and slice the zucchini and radishes.
Peel onions and cut them into rings. Mix all ingredients in a large bowl. For the marinade, mix vinegar and 4 tablespoons of water. Peel garlic and press it through a garlic press, add it.
Wash the herbs and dab dry. Chop parsley and dill. Cut chives into small rolls and add. Stir in oil and season to taste with salt, pepper and sugar. Mix the marinade with the salad just before serving.