Peel, wash and halve the potatoes and cook in boiling salted water for about 15 minutes. Clean, wash and cut broccoli into florets. Cook broccoli in boiling salted water for about 5 minutes, drain and rinse with cold water.
Dab the meat dry and cut into large pieces, season with salt and pepper. Heat oil in a pan, fry meat in it for about 5 minutes, remove from the pan. Clean, wash and dice the peppers.
Drain the potatoes, grate the cheese. Melt the fat in a pot. Stir in flour and sweat briefly. Add milk and stock while stirring and let simmer for 5-8 minutes while stirring. Stir in 50 g cheese, season with salt and nutmeg.
Place the potatoes, broccoli, meat and peppers in an ovenproof dish. Pour Bechamel over it and sprinkle with 50 g cheese. In a preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: see
manufacturer) bake for about 15 minutes