Using a blender or food processor, blend together any chunks of vegetables in the pasta sauce, giving it a less chunky, thicker consistency.
Spread the tomato sauce on dehydrator trays that are covered with non-stick sheets; spread uniformly, no more than 1/2 inch thick.
Dehydrate at 135 degrees for 6-8 hours.
At about hour 4 or 5, peel off the tomato leather and flip it.
Let cool, tear into pieces, and pack in a sealable bag.