Heat no stick pan. Add onions and cook until transluscent. If necessary add tsp or so water so onions do not stick. Meantime purée beans with spices in a blender. Add chilies to onions in pan. Stir in puréed beans. Heat and stir in 1/2 cup broth. Stir through. Heat on med, lid on 10 minutes,stir just to check bottom of pan for sticking....if drying out too quickly add small amount of broth. You want a bit of liquid in mixture until all has cooked through on med for about 12 minutes. Lid off, stir to. Check, turn to low. Prep your tortillas, get out your salsa. Enjoy!