Wash the potatoes and cook in plenty of boiling water for about 20 minutes. Rinse under cold water, drain and peel. Wash and clean the cucumber and cut into thin slices. Peel and finely chop the onion. Whisk vinegar, oil, mustard and stock. Season to taste with salt and pepper. Cut potatoes into slices and marinate them with the sauce
Wash the lemon hot, grate dry, peel the peel in thin strips with a pestle ripper. Halve the fruit, squeeze 1 half and cut 1 half into slices. Dab flesh dry, season with salt and pepper and sprinkle with lemon juice. Whisk eggs. Mix Panko and lemon zests. Turn escalopes one after the other in flour, egg and Panko
Heat the lard in two pans. Fry the escalopes for about 6 minutes while turning. Arrange schnitzel and salad with lemon slices on plates