Peel, wash and cut the carrots into thick slices. Peel shallots and cut them into halves or quarters depending on size. Preheat the oven (electric cooker: 225°C/circulating air: 200°C/gas: see manufacturer).
Knead breadcrumbs, butter and mustard. Season with salt and pepper. Wash the schnitzel and dab dry. Heat oil in a large pan. Fry the schnitzels for 2 minutes on each side. Season with salt and pepper.
Remove and place in an ovenproof dish.
Stir-fry the carrots and shallots in hot frying fat for about 5 minutes. Sprinkle with 1 tbsp. sugar, caramelise briefly while stirring. Add 150 ml water and 2-4 tbsp vinegar - according to taste -, bring to the boil and simmer for approx. 5 minutes.
In the meantime, spread the crumb mixture evenly over the cossettes. Bake in a hot oven for 3-5 minutes. Wash the thyme, shake dry, remove the leaves and fold into the vegetables. Season to taste with salt and pepper.
Serve the escalopes with vegetables. Roast potatoes taste good with it.