Cook the potatoes in boiling water for 15-20 minutes. Drain, rinse and peel. Peel, wash and slice carrots. Wash and clean the beans. Cook both in boiling salted water for about 10 minutes, drain.
Fry the meat in 1 tablespoon of hot oil for about 3 minutes on each side. Season with salt and pepper and remove. Dice onion. Cut potatoes into slices. Heat 1 tablespoon of oil in frying fat.
Fry the onions and potatoes for about 8 minutes, turning them over. Add carrots, beans and peas. Add tomato paste and stock, season to taste. Pluck marjoram leaves from a stalk and add to the pan.
Grease a casserole dish. Layer the potato and vegetable pan and the meat. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 15-20 minutes. Garnish with rest of marjoram.