1heat a large sauce pan, add oil , and brown pot roast on both sides.
2add onion, garlic, oregano, basil, salt , pepper, sugar, bay leaves, add tomatoes and 3 cans of water.
simmer for about 3 hours, stirring occasionally.
( I cover the pot )
3in a bowl mix some of the sauce or some water with the paste till smooth, add to pot, and continue cooking and stirring for about another hour, until meat is very tender, and sauce has thickened.
4taste sauce and adjust to taste( salt, pepper,sugar). If you add anything more cook another 5 to 10 minutes.
5this is good with the meat shredded into the sauce and served over spaghetti. or for sandwiches on Italian or french bread,or even with mashed potatoes on the side, I like to serve it with stuffed shells and plenty of garlic bread or buttered bread.