Meatballs: Mix all the wet meatball ingredients together in a large bowl. Mix the dry meatball ingredients in a medium bowl, then add to the wet ingredients. Mix with your hands until evenly blended. Roll the meat into meatballs, about 3-4 cm (1 to 1.5 inches) in diameter.
Roll in rice: Put the 1 cup uncooked rice in a bowl, and roll the meatballs in the rice. Pat the rice into the surface to get it to stick better. Set meatballs aside.
Prepare sauce: In a large pan with high sides for which you have a cover, whisk all the sauce ingredients together and bring to a simmer.
Arrange the meatballs in the pan, in the sauce, and sprinkle in the unused rice. With a spoon, make sure all the rice is coated with some sauce, pushing the extra rice into the sauce.
Cook: Cover and simmer over low heat for 25 minutes, until rice is tender but not too soft and meatballs are cooked through.