Separate eggs. Beat egg whites, salt and lemon juice until stiff. Carefully stir in the egg yolks. Sift the starch over it and fold in. Heat the fat in a pan (28 cm Ø) and remove from the heat. Add the egg dough and smooth it down.
Cover the foam omelette and let it simmer at low heat for about 20 minutes. In the meantime, clean and trim the mushrooms and herb side dishes and, depending on their size, cut them into smaller pieces if necessary. Peel and finely chop the onion. Dice the smoked pork. Heat oil in a pan. Brown the mushrooms and onion in it. Add peas and smoked pork, deglaze with cream and stock. Bring everything to the boil. Stir in sauce thickener. Season to taste with salt and pepper. Wash the marjoram and pluck the leaves from the stalks.
Brown the mushrooms and onion in it. Add peas and smoked pork, deglaze with cream and stock. Bring everything to the boil. Stir in sauce thickener. Season to taste with salt and pepper. Wash the marjoram and pluck the leaves from the stalks. Halve the omelette and arrange on plates with mushroom-cassel cream. Sprinkle with marjoram