This recipe, submitted by Mary S. from Ada, Oklahoma, won 2nd place in the 2005 Reader Recipe Contest for oatmeal.
Preheat oven to 400°F.
For meatballs: In a bowl, mix all meatball ingredients together until well combined. Shape into 1-inch balls.
Coat a large skillet with nonstick cooking spray. Cook meatballs in a single layer over medium heat for 10 to 15 minutes, turning occasionally to brown on all sides. Drain well and place in a single layer in a 13x9-inch baking dish.
For glaze: In a food processor or blender, purée jam and vinegar together until smooth. Place jam mixture and mustard in a microwave-safe bowl, stir to blend, and microwave on high for 2 to 3 minutes, or until jam is melted. Spoon the mixture over meatballs. Bake for 15 minutes. Serve warm.