Caramelized Onion with Pancetta and Rosemary Stuffing

Caramelized Onion with Pancetta and Rosemary StuffingCopyright Tony Gaye Photography 2009
6 tablespoons butter 2 large sweet onions, diced (about 3 cups) 1 package (4 ounces) cubed pancetta (about 1 cup) 4 cloves garlic, chopped 2 stalks celery, diced (about 1 cup) 2 tablespoons chopped fresh rosemary leaves 3 cups Swanson® Chicken Broth (Regular, Natural Goodness® or Certified Organic) 1/4 cup sherry 1 package (14 ounces) Pepperidge Farm® Herb Seasoned Stuffing