What's your favourite pasta sauce recipe?

Nothing beats a good bolognese sauce -- hearty, filling and oozes warmth. I used the Jamie Oliver recipe as a base but I will tweak the spices here and there, add extra ingredients like mushrooms. I also quite like the Arrabiatta sauce, it's like a spicier version of the bolognese. http://www.jamieoliver.com/recipes/beef-recipes/spaghetti-bolognese/