Preheat oven to 400 degrees Fahrenheit and line a baking sheet with aluminum foil.
In a large bowl, combine ground meat, egg, onion, oats, cumin, garlic powder, rosemary, salt and pepper.
Using your hands, roll the meat into balls about 2-3 inches in diameter. Spread them out evenly on the baking sheet.
Bake the meatballs for 15 minutes.
While the meatballs are baking, in a small saucepan bring the prunes and ½ cup of orange juice to a boil. Reduce the heat to medium and allow the mixture to simmer while you stir and mash the prunes. Once some of the liquid has evaporated, bring the temperature back up to high and add in the remaining ½ cup of orange juice. Bring this to a boil and then reduce to a simmer again. Cook for 5-7 minutes, stirring continuously until the prunes are well incorporated into the liquid and the mixture is thick.
Either in the saucepan or a separate bowl, combine the cooked meatballs and the glaze and stir so that each meatball is covered.
Serve over a bed of rice and enjoy!