For the pickled vegetables: Stir all the ingredients to blend in a small bowl. Cover and refrigerate overnight. The longer the mixture sits, the more the flavor develops. I sometimes make this 2 days in advance.
For the meatballs: Combine all the ingredients in a large bowl. Scoop individual meatballs using an ice cream scooper. Arrange in a single layer in a baking dish. Bake in a 350 F oven for 40 min or until nicely browned and cooked through.
For the dressing: mix all ingredients until well-blended