In the bowl of a blender, food processor, or a blender party cup, place 1/2 to 3/4 of the can of tomatoes, the cilantro, jalapeno pepper to taste, and the scallions. Blend until smooth. Pour this mixture into a medium mixing bowl.
Alternatively, you can chop the cilantro, jalapeno, and scallions and mix these ingredients together in a bowl with the tomatoes.
Add the remaining tomatoes, the tomato sauce, lime juice, and salt to taste. Adjust seasonings and serve.
The salsa is good for up to a week, covered in the refrigerator.