Add sirloin beef cubes, onions, tomato paste, red wine vinegar, brown sugar, and stir with a wooden spoon Add bay leaf, cinnamon stick, clove, cumin, raisins, beef stock and stir well.
Place lid on and let the stifado cook 3 hours, then add salt and pepper to taste.
Serve with rice or any type of pasta you may like.
Any leftovers can surely be put into the freezer for up to 2 months in an airtight container.