Clean and peel the carrots and cut them into slices about 2 mm thick. Bring the stock to the boil, add the carrots and cook for about 3 minutes. Take out the carrots and set aside
Heat the fat in a saucepan, stir in the flour and sweat for about 5 minutes without letting any colour take over. Stir in stock and milk and simmer for about 10 minutes, stirring occasionally. In the meantime wash and dry the cutlet. Peel onion and cut into rings. Heat oil in a coated pan and fry the cutlet in it for about 8 minutes on both sides. Approx. 4 minutes before the end of the cooking time add the onion and fry.
Meanwhile wash parsley, dab dry and pluck off. Then chop finely. Add peas and carrots to the boiling béchamel sauce and bring to the boil. Season to taste with salt and nutmeg and add parsley. Arrange the cutlet with onion and peas-carrots. Serve with baguette