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