Instructions

  1. Heat oil in a skillet over medium-high heat and brown beef-- in batches if necessary, adding more oil if needed.
  2. Transfer beef to crock pot with a slotted spoon.
  3. Reduce heat to medium and add onions to skillet, cooking until soft; add garlic, cinnamon and allspice and cook for 1 minute.
  4. Add vinegar, tomato sauce, sugar and bay leaf and stir well to combine.
  5. Pour mixture over meat.
  6. Cover and cook on Low for 8 to 10 hours or on High for 4 to 5 hours, until beef is tender.
  7. Add feta cheese, cover again, and cook on High for 10 minutes.
  8. Discard bay leaf and serve over hot buttered pasta or mashed potatoes.