oven to 350°
Remove the seeds and the veins from the chiles. Flatten out the chilies and toast
until the skin blisters either using a hot skillet or in a hot oven. Take care
not to burn the chilies or they may become bitter in flavor.
Soak the toasted chiles in warm water. Once softened, remove the chiles from the
water and combine in a blender with the beer. Blend until smooth.
Using the same toasting technique as for the chilies, quickly toast the spices
and grind them. Set a small amount aside and add the rest to blended chile
Season the lamb shanks liberally with salt and pepper. In a very hot pan, brown
the shanks on all sides.
Line your braising pan with parchment paper and place the lamb shanks on top of
the parchment paper. Pour the blended chile-spice mixture over top. Add enough
chicken stock to cover the lamb shanks. Cover and braise in the oven for about
two hours. The meat should be tender and falling off the bone. Remove from oven
and allow to cool.
Once cool, pull the meat from shank. Allow the meat to rest in sauce.
To assemble each pouch, begin with a maguey leaf square. On top of that, place a
banana leaf and an avocado leaf. Top with about 4 ounces of meat. Sprinkle with
a bit of salt and the some of the remaining dry spices. Add a bit of the cooking
liquid. Tie each package shut with kitchen twine.
Before serving, steam the bundles for 15 minutes. Place each bundle in a bowl. Remove the string and open to serve. Serve with warm tortillas.