Peel, wash and finely dice the carrots. Peel and chop the onion. Heat 2 tablespoons of oil in a frying pan. Fry the ground pork in it until crumbly. Fry the carrots and onion briefly. Stir in tomato paste and sauté briefly.
Deglaze with tomatoes and juice. Season with herbs, salt and pepper. Bring to the boil and simmer open for about 15 minutes. Season to taste.
Heat butter. Dust with flour and sweat lightly. Stir in milk, 300 ml water and stock. Bring to the boil and simmer open for about 5 minutes. Season béchamel with salt and nutmeg. Wash the tomatoes.
Heat 1 tablespoon of oil in a frying pan. Fry the tomatoes briefly in it. Season with salt and pepper.
Ca. 1⁄3 Spread the béchamel in an ovenproof dish (approx. 15 x 24 cm; min. 6 cm high). Place the cannelloni close together vertically in the dish. Approx. 3⁄4 Spread the Bolognese in the cannelloni. Spread the rest of the béchamel on top.
Add the rest of the bolognese and tomatoes.
Dice mozzarella. Sprinkle all the cheese on top. Place the mould on a baking tray. Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) for 40-50 minutes. Cover if necessary.