Heat oil in a large skillet, and saute the onion and garlic over medium heat until softened. Stir in the roasted tomatoes, tomato sauce, chicken stock and basil. Simmer for 5 minutes, stirring occasionally. Adjust seasonings with salt and pepper.
*5 plum tomatoes cut in half, drizzled with olive oil, put in a roasting pan and roasted at 325 degrees for about 45 minutes, then skinned and cored, and the flesh chopped