The ultimate bolognese

What is your method? I started out with lots of things but now add less and less.
What do you reckon makes the ultimate bolognese?

Here is what I THINK

Use beef 3/4 - use either veal or pork 1/4… cook slow as you can…

per 500 gms of meat:

  • 1 finely chopped onion
  • one teaspoon of garlic
  • 4 cans of whole peeled tomatoes (pref “la gina” brand)
  • 2 bay leafs
  • 4 teaspoons red wine vinegar