This is actually a sauce my husband created from our friend Isabelle who taught us both how to make authentic Mexican food. He changes a few things to her original recipe.
Boil 3-4 Tomatoes, 1 seeded Jalapeno, and 1 whole onion (Half if it is really large) until they are really soft.
Puree in food processor while heating up a few ounces of Olive Oil.
Add back into pan with hot oil and bring to boil while adding:
1-2 Tablespoons of Chicken Soup Base
This sauce is great on Chile Rellenos, Tamales, or any Mexican food dish.