Preheat your broiler to high.
Arrange the tomatillos, garlic, and onion on a sheet tray.
Broil until blackened and tender, turning as needed. Tomatillos: ~17 minutes, Onion: ~17 minutes, Garlic: ~12 minutes.
Add the chipotles, garlic (peeled), onion, water, and seasonings to a blender.
Blend until nearly smooth. Add roasted tomatillos and blend on low until your desired consistency is reached.
Taste and adjust with more salt or bouillon as needed.
