Chipotle Mexican grill barbacoa

Toast chilies, cover with boiling water in a deep bowl and set aside for 20 minutes

Grind cumin, cloves, allspice, and oregano in a coffee grinder

Drain soaked chilies, puree Chillies in a blender, ground spices, thyme, garlic, onion, vinegar, and 1/2 cup of water

Process mixture until it is smooth

Push mixture through a sieve, and season beef with salt and pepper

Rub paste all over the meat

Arrange in a bowl and allow the meat to marinate for four hours, refrigerated

Preheat the oven to 325 degrees

In a deep roaster pan, scatter half of the avocado leaves on the bottom, place meat on top of the avocado leaves, and scatter the remaining leaves over the meat

Cover the pan tightly with aluminum foil

Cook the beef 6 to 7 hours until meat is falling off the bone

If you are using lamb, shoulder, cook for 4 hours