First prepare the meatballs.
Chop the onion, garlic and the parsley. You can use a food processor.
The meat should be beef, from the flank part of the beef if possible, with 12% fat.
Rinse and drain the rice.
In a mixing bowl add the meat, onion, garlic, parsley, salt, pepper, cumin and rice. Knead until well combined about 5 minutes.
Meanwhile boil about a litre of water with ½ teaspoon of salt.
Make small meatballs from the meat and place them on a flat dish or tray. Sprinkle a tablespoons of flour. Make sure all the meatballs are covered with flour.
When all the meatballs are ready, drop them into the boiling water. Cook until the rice in the meatballs are cooked. You can understand by the looks or by tasting one. Remove from the heat, when the rice is ready.
While cooking if unpleasent looking bubbles come up, skim and discard them.