Instructions

  1. Place onion in slow cooker and top with beef roast.
  2. In a small bowl, whisk together remaining ingredients and pour over beef roast.
  3. Cook on low for about 8 hours.
  4. Remove roast from slow cooker, reserving juice.
  5. Use 2 forks to shred meat; mix in enough of the reserved juice until it is the desired consistency.
  6. Use as filling to tacos, burritos, enchiladas, quesadillas, or nachos.