Heat oven to 350 degrees. Mix meat, rice, 1/2 cup water, the onions, salts, garlic powder and pepper.
Shape mixture by rounded tablespoonfuls into balls. Place meatballs in ungreased baking dish (preferrably one that can go into
the freezer and into the oven), 8x8x2 inches.
Stir together remaining ingredients; pour over meatballs. Cover with aluminum foil. Bake 45 minutes.
To Freeze: Keep aluminum foil on the dish and freeze.
To Reheat: Reheat from frozen at 350 degrees until heated through (about an hour and 15 minutes). Bake an additional 15 minutes without the aluminum foil to brown.