Peel and wash the potatoes, cut them into pieces and cook them in salted water for about 20 minutes until soft. Approx. 5 minutes before the end of the cooking time, add the peas without defrosting them and cook with them
Wash the meat, dab dry and season with salt and pepper. Heat 1 tablespoon of oil in a frying pan. Fry the meat for 3-4 minutes, turning it over, take it out and put it in an ovenproof dish. Grate cheese. Coarsely chop the walnuts, knead with 75 g butter and parmesan and spread on the fillets. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes
Wash, clean, slice or plane the cucumber. Peel and finely dice the shallot. Mix vinegar, mustard and honey, season with salt and pepper, fold in 4 tablespoons of oil. Mix cucumber and vinaigrette, season again
Drain the potatoes and peas. Add 50 g butter and milk, mash to puree, season to taste with salt, pepper and nutmeg. Wash mint, shake dry, pluck leaves from the stalks, cut finely, fold into the puree. Take the meat out, cut into slices, arrange with the puree and salad