Slice the onions.

Heat vegetable oil in a large pan.

Fry the sliced onions in the oil until soft and golden brown.

Add the cubed meat to the pan.

Turn the meat to brown it on all sides.

Season with salt, pepper, and cinnamon.

Add water to cover the meat.

Cook, covered, for about 1 1/2 hours, or until the meat is very tender, adding water if it becomes dry.

Add the orzo pasta.

Cover with water.

Cook for a further 20 minutes, or until the pasta is tender.

Add more water if necessary, ensuring a generous amount of sauce remains.

Serve hot with grated Parmesan cheese, if desired.