1 flank steak, about 3 pounds
2 chipotle peppers, in adobo sauce
1 1/4 cups beef broth
3 cloves garlic, minced
1 tablespoon ground cumin
1 tablespoon dried oregano
1 teaspoon salt
1/2 teaspoon ground black pepper
Juice of 1 lime
3 green onions sliced
Place the flank steak into a 6-quart slow cooker.
Place the chipotle peppers into a large bowl and mash them a little bit with a fork.
Add the rest of the ingredients, except the green onions, to the bowl and stir to incorporate everything together.
Pour the mixture from the bowl over the flank steak in the slow cooker.
Place the lid on the slow cooker and cook on low for 8 hours or on high for 4 hours.
Remove the flank steak from the slow cooker onto a cutting board. Using two forks, shred the steak and then place it back into the slow cooker to absorb some of the juices.
Spoon the shredded steak onto a platter and top with sliced green onions.