Peel the onions. Cut one onion into rings, the other into cubes. Wash and finely chop the parsley. Cut cheese into 12-16 slices
Mix vinegar, onion cubes, parsley, salt, pepper and sugar. Whip the oil into the mixture. Drizzle the cheese with the vinaigrette and let it stand for about 5 minutes. Turn the cheese in the vinaigrette from time to time
Roughly chop the nuts. Clean and wash the salad leaves and pluck them smaller. Distribute on plates. Arrange onion rings and the marinated cheese on top. Drizzle the rest of the marinade over it and sprinkle with the nuts. Serve with crispy baguette
The cheese tastes even spicier if you marinate it longer. And it keeps well sealed in the refrigerator for 2-3 days. A delicious variation: pickled mozzarella in this way