I have long given up. A can of whole imported tomatoes, some garlic, oregano, salt and olive oil, a blender, and heat on the stove top will do the trick, especially if you drain off all the water first, and let it sit overnight and re heat.
"Io sono stanco, sono imbigliato, and I wan't everyone here to know, there ain't gonna be no trouble from me..Don Corleone..Cicc' a port!"
