To make aceite de chile

• Heat pan, toast chiles on medium heat for 2 minutes. You'll smell the flavor of the chile de arbol tostado when it's time to transfer them over to a cool surface (parchment, plate, bowl, etc).
• Use same pan and turn stove to lowest heat setting.
• Place sesame seeds in pan, and let them toast for a about 2 minutes. Once they appear to be lighter shade of toasted turn transfer to same plate as chile.
• Add oil to pan and warm for 3 minutes. (proceed to next step, if you're a pro at making salsa and have no problem remembering to come back to this step.)
• Place toasted sesame and chili in blender, blend dry for 15 seconds or more. Dont open the lid, just notice the powder red texture. That's what we are going for. Transfer all chili powder into food safe jar and carefully place empty blender into sink.
• Place warmed oil in over the chili and add salt, vinegar. Stir several times to mix evenly. Let cool for 10 minutes in jar to allow contents to settle.