2 red tomatoes
2 tomatillos, they are midsize in comparison to the tomatoes
2 jalapeno
1 white onion, (yellow is fine)
some cilantro and salt.

Boil the tomatoes, tomatillos (minus the husk/leave) and pepper until skin is soft and about to break. take them out of the boiling water and place them in a blender, along with half onion, and half of the cilantro, blend away.

Add salt to taste, cube the remaining cilantro and onions and add to mixture. Let it sit in room temperature for a bit to cool down and then refrigerate overnight. It will have an awesome taste the next day.
Been doing this recipe for years, whenever I see the tomatoes, tomatillos and peppers on sale, I buy a few and freeze them for this purpose, as I go through a batch of this salsa weekly.