1eachgreen bell pepper, seeded and sliced into strips
1smallonion, sliced
2clovesgarlic, chopped
1teaspoonground cumin
1teaspoonchopped fresh cilantro
1tablespoonolive oil
1tablespoonwhite vinegar
Instructions
Heat vegetable oil in a large skillet over medium-high heat. Add flank steak and cook until browned, about 4 minutes per side.
Transfer steak to a slow cooker; pour in beef broth and tomato sauce. Add tomato paste, bell pepper, onion, garlic, cumin, cilantro, olive oil, and vinegar; stir until well blended.
Cover and cook on Low for up to 10 hours, or on High for 4 hours.
Shred steak in the slow cooker with two forks.
Notes
Serve with sour cream, cheese, and fresh cilantro on the side.