No Cream Gratin of Potatoes and Carmelized Onions

Name: No-Cream Gratin of Potatoes and Carmelized Onions
Ingredients: 2 tablespoons unsalted butter; 2 med. vidalia or other sweet onions, thinly sliced; 3 garlic cloves, chopped; Kosher salt and freshly ground pepper; 1/2 teaspoon chopped fresh thyme; 1/2 cup dry white wine; 1/2 cup chicken broth; 3-4 lg. russet potatoes; 1/2 cup fresh bread crumbs; Handful fresh flat-leaf parsley