Cover chiles and peeled garlic cloves with boiling water. Cover and let soak 3 hours or longer.
Drain and add to blender with remaining ingredients.
Blend until smooth. Taste to see if you’d like more salt.
Pour into a jar and cover loosely. Allow to age in a dark cabinet for a week, maybe longer. It might bubble a little so we want to wait for that to finish before pouring into salsa jars.
Transfer to smaller jars and seal. Keeps at room temperature for 6 months.