In a pan add the oil and the rest of your ingredients to cook,
leave there for like 10 minutes in a low heat.
Mix once in a while so you can make sure that all the tomatillos are getting roasted.
Cover the pan.
Once all the tomatillos got like a dark green and the jalapeños too they are ready to be blended.
Add all to a blender including the liquid in the pan and salt.