In parallel with the hot patty, prepare other ingredients. Start by slicing onions. If you have a white or red onion, marinate: a pinch of sugar, sprinkle with vinegar, mix. While the rest is cooking, pickle the onion. If you use shallots, there is no need to marinate. Slice the pickled cucumber (it is salted, not pickled or fresh). Cut the tomato into rings. Cut the cheese into thin slices, ready-made slices of cheese for sandwiches are convenient, if there are none, Emmental, mozzarella, etc. will do. Use iceberg lettuce or Chinese (Peking) cabbage leaves. Lettuce leaves are not suitable (for warm cutlets, it will become very soft, it will stop cracking).