Water Tomatoes Onion Jalapeño Garlic Salt Cilantro
Put the tomatoes, onion, jalapeño, and garlic in a large pot with water and bring to a boil. Discard the water.
Let the ingredients cool slightly and put into a blender. Add salt and cilantro and blend until smooth.
This is a very basic recipe. From here, you can do all kinds of things. iBuen Provecho!