Wash the potatoes and cook in boiling water for about 15 minutes. Pour off, rinse with cold water, peel and cut into slices. Wash the meat and dab dry. Heat oil in a pan. Fry the meat in it at medium heat on each side for about 4 minutes.
Remove and keep warm. In the meantime, peel and finely dice the onion. Wash the apple and cut out the core. Cut the apple into thin slices. Drizzle with lemon juice. Fry the onion in the cooking fat for about 1 minute. Add potatoes and apple slices and fry for 4-5 minutes. Season with salt and pepper. Wash the thyme, dab dry and pluck the leaves from the stalk. Sprinkle over the vegetables shortly before the end of the frying time.
Add potatoes and apple slices and fry for 4-5 minutes. Season with salt and pepper. Wash the thyme, dab dry and pluck the leaves from the stalk. Sprinkle over the vegetables shortly before the end of the frying time. Season sour cream with salt and pepper. Arrange cutlet, potato and apple vegetables and sour cream on a plate. Sprinkle with steak pepper and serve garnished with parsley and thyme