BARBECUED MEATBALLS

* 2 pounds ground beef
* 1 cup bread crumbs
* 1 teaspoon garlic powder
* 2 packages onion soup mix
* 2 teaspoons Worcestershire sauce
* 2 eggs

Sauce:
* 2 onions, chopped
* 2 cans tomato paste (12 ounces total)
* 2 cloves garlic, minced
* 1/4 cup Worcestershire sauce
* 1/4 cup red wine vinegar
* 1/2 cup brown sugar
* 1/2 cup sweet pickle relish
* 1/2 cup beef broth
* 2 teaspoons salt
* 2 teaspoons dry mustard