I got this recipe from a colleague at work. She was reluctant to give out the recipe to the "masses" but she was kind enough to give it to me. I have tweaked it a little, so it's a collaboration at this point. She approves of the changes and has incorporated them. A little heat, a lot of heat - up to you!
Place onions, cilantro, jalapeno and vinegar into a food processor and pulse until onions are in fairly small pieces.
Scrape down the sides of the food processor and add the stewed tomatoes, lime juice and smoked paprika. Process 30 seconds or so until very well mixed. Taste for heat - add additional jalapeno if more heat is desired.