Clean, peel and wash the carrot. Clean and wash the celery. Peel onion and garlic. Cut everything into very fine cubes. Wash the oregano, shake dry and pluck the leaves.
Cut the bacon into small cubes and fry it crisply in a pan without fat. Add the minced meat, stir-fry for 5-8 minutes until finely crumbly. Add vegetables, onion and garlic and continue frying for 2-3 minutes. Stir in tomato paste and sauté briefly.
Add wine, bring to the boil and reduce by half.
Add the tomatoes and juice and chop a little with the spatula. Stir in oregano. Bring sauce to the boil and simmer for 15-20 minutes.
Meanwhile, cook the spaghetti in 3-4 l boiling salted water (1 teaspoon salt per litre) according to the instructions on the packet and grate the Parmesan cheese.
If the sauce has been boiled down too much, stir in some pasta water (4-5 tablespoons). Season to taste with salt, pepper and 1⁄2-1 teaspoon sugar. Drain the noodles, put them back into the pot and mix with the sauce.
Arrange and sprinkle with parmesan.