Don't toast the chiles longer than 20 seconds per side or they turn bitter. Sear the beef well for a deeper consomé, and always save the red fat skimmed from the top to fry the tortillas — that's the key to crispy edges. Store shredded beef and consomé separately in the fridge for 4-5 days or freeze for up to 3 months. Reheat the consomé and fry the tortillas fresh; microwaved tortillas turn soggy. Skip the cheese for dairy-free, and use corn tortillas to keep it gluten-free.