Peel and wash the vegetables. Dice turnip, quarter potatoes and cut carrots into slices. Finely dice 75 g bacon. Cut remaining bacon into thick slices. Fry the bacon slices in hot oil.
Add vegetables and fill up with 1 1/2 litres of water. Season with salt and pepper. Let everything cook for about 15 minutes. Meanwhile peel and chop onions for the crust. Crumble the toast roughly. Wash the marjoram and, except for a few leaves for garnishing, chop and mix with the bacon cubes.
Pour the vegetables into an ovenproof dish. Cover with the liquid. Spread the crust mixture and fat in flakes on top. Bake everything in a preheated oven (electric: 200 °C/ gas: level 3) for about 15 minutes.
Serve sprinkled with marjoram leaves.