Peel the shallots and halve or quarter them depending on size. Peel, wash and dice the potatoes. Heat 2 tablespoons of lard in a pan. Fry the potatoes for about 5 minutes, turning them over.
Peel the garlic and press it through a press. Add the shallots and garlic to the pan after about 3 minutes. Season with salt and pepper. Add 100 ml water and bring to the boil. Cover and cook for another 15 minutes, stirring occasionally.
Wash the meat, dab dry. Season with salt. Heat 1 tablespoon of lard in an ovenproof pan and fry the meat in it on each side for about 3 minutes. Finish cooking in the preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: level 1) for approx. 6 minutes.
Season with pepper. Slice Parmesan cheese into shavings and mix with the potatoes. Arrange steaks and potatoes on plates. Sour cream tastes good with it.