Finely chop the celery, carrot, onion and garlic
Lightly fry the vegetables in the olive oil then add some tomato puree
Add the minced meat and cook until brown and quite dry
Pour in the red wine and cook until it evaporates
Add the passata and bring to the boil
Check the taste, add sugar to make it less acid and salt for seasoning
Cook the tagliatelle in boiling salted water for three minutes.
Drain the pasta and serve topped with the ragu