Lightly toast the chillies, then boil for 30 mins
Remove the chillies and allow to cool
Add all the sauce ingredients to a food processor except the last 1/3 cup of Oil and remove all the stems and seeds from the chillies before adding in
Blend to a smooth paste
In a saucepan, add the oil and all the sauce, cover and cook for 10 minutes, stirring at intervals
Allow the sauce to cool
Cut the Beef into smaller chunks so they have more surface area and they are easier to wrap
Marinate with some of the chilli paste and wrap each one in banana leaf
If your banana leaf is too small, rewrap in foil for a tight seal
Add these to a dutch oven or a heavy pot with a tight lid
Pour in the beer cover, and allow to cook for 4 hours in a 350 degree oven
After the cook time, the beef should just fall apart
Add dollops of the prepared chilli sauce and serve