Clean and wash the carrots, leaving about 1 cm of the green. Bring the stock to the boil, add the carrots and cook covered for 8-10 minutes. Wash the thyme, dab dry and remove the leaves from the stems.
Lift the carrots out of the stock and let them cool down. Mix about 5 tablespoons of stock, crème fraîche and some thyme. Season with salt and pepper. Halve the bacon slices lengthwise and wrap around the carrots.
Place the carrots in an ovenproof dish and pour the sauce over them. Sprinkle with cheese and bake in a preheated oven (electric: 225 ° C/ gas: level 4) for about 15 minutes. Mix butter, fried onions and remaining thyme.
Cut the baguette roll into slices and spread with the butter mixture. Put them on the baking tray about 5 minutes before the end of the baking time. Roast the slices until golden brown and serve with the baked carrots.
Garnish as desired with fresh herbs.