Italian Red Sauce

This was given to me by our good friend Dave Porter. He served a mission in Italy were he learned how to make the sauce.
In a big sauce pan combine
1 Bottle of home canned tomatoes ( I sometimes use a quart size store bought can)(Rendy uses fresh tomatoes and purees them if you do this be sure and add 1 tsp salt and 1 tsp sugar)
1 Large can of tomato paste
2 Tbs. Italian seasoning (Rendy uses fresh Italian herbs in his)
2 cloves of garlic crushed
1 medium onion diced
Let come to a boil over medium heat and then simmer a day or a couple of hours stirring occasionally.