Always use a crockpot for this recipe. Start cooking the roast in the morning and let it cook all day until the meat can be easily shredded. Never cook the roast in water, let it cook alone and make juices.
When the roast is cooked, remove from crock pot and shred on a large plate. After shredding, put the meat back into the crock pot along with all the other ingredients and stir together well. Continue to cook in the crockpot for another 15 minutes.
Heat flour tortillas and place the meat on the tortillas and roll into burritos.
If you want to make these into Chimichangas, you can deep fry them also.
They can be topped with sour cream and guacamole.
You can also put cheese inside if you like.