Grilled Hamburger Steaks with Roasted Onions - Legendary Recipes %

Ingredients

• 4 lean ground beef patties (4 to 6 ounces each)
• 2 tablespoons steak sauce
• 1 envelope (1 ounce) onion soup mix (from 2-ounce package)
• 2 large Bermuda or other sweet onions, cut in half, then thinly sliced and separated (6 cups)
• 2 tablespoons packed brown sugar
• 1 tablespoon balsamic vinegar