I think mines based upon a Jamie Oliver recipe I think. Here goes.
Fry onion with bacon (strips or lardons), finely chopped carrot and celery.
I then add the mince and combine with the above, with garlic.
Once browned, I add a splash of Worcester sauce, a tin of chopped tomatos, Passata, oregano/basil, tomato purée and a little more garlic. If I have any red wine, I also a glass of this and as we like ours spicy I also will add some dried chilli flakes.
Vegtable wise, I also add a few cubes of frozen spinach and sometimes mushrooms, grated courgette or peppers.
The difference in a great bolognase (or ragu) sauce, is to cook it for a long time. I usually cook mine on a hob for at least 1 1/2 hours, but will cook longer if I can.
I usually cook quite a lot of this, so always have quite a bit left over. I either freeze portions for a quick last minute meal, or a use the sauce to make lasagna/stuffed cannelloni on another day.