Roast the tomatoes, tomatillos, onion, and 2 unpeeled garlic cloves on a comal over medium to medium high heat. Once cooked and charred/blacked all around, remove from the heat. Some ingredients will be ready sooner then others. Allow them to cool down.
Remove the peel from the garlic. Cut out the stem from the onion. Add all the roasted ingredients into a blender together with the small raw garlic clove, chipotle peppers, and cumin. Blend until completely smooth.
Pour the salsa into a container, stir in salt and set aside until needed.