Place all the vegetables and dried chillies in a sauce pan and add two cups of water. Bring it to a boil. Boil for 10 min to medium heat.
Transfer everything to a blender and add salt and pinch of cumin. Pour back the sauce into the sauce pan and cook for further 5 min, so all the ingredients combine well.
You can use this simple sauce for chilaquiles, enchiladas, pozole, or pork in chile colorado.