Ingredients
2 tablespoons butter3 large sweet onions, halved and thinly sliced (about 6 cups)2 garlic cloves, minced1 tablespoon brown sugar1 tablespoon balsamic vinegar1/2 teaspoon salt1/4 teaspoon pepper1 loaf (1 pound) frozen pizza dough, thawed8 ounces Brie cheese, cut into 1/2-inch pieces
Preparation
Grease a 15x10x1-in. baking pan; set aside. In a large skillet, heat butter over medium heat. Add onions; cook and stir 4-6 minutes or until softened. Reduce heat to medium-low; cook 25-30 minutes or until deep golden brown, stirring occasionally. Add garlic; cook and stir 1 minute longer.
Preheat oven to 425°. Add brown sugar, vinegar, salt and pepper to onion mixture. Cook and stir 5 minutes longer. Press dough into a 12x10-in. rectangle on prepared pan. Top with onion mixture and cheese. Bake 20-25 minutes or until golden brown. Let stand 10 minutes before cutting.
