Butter in pan.

Garlic cloves.  Remove when browned.

Half an onion.  Not chopped.

Can of plum tomatoes.  Salt.

Cook for 45 minutes on a medium heat.  Reduce.  Stir now and then.  Remove onion (eat separately).

Adjust ingredient amounts to taste, apart from the onion.

Based on a Marcella Hazan recipe.

http://www.goodreads.com/book/show/19552.Essentials_of_Classic_Italian_Cooking