Melt 2 tablespoons butter in a saucepan over medium heat. Add 1 each sliced Vidalia onion and red onion; cook, stirring, until soft, about 15 minutes. Add 1/4 cup ketchup, 1 tablespoon red wine vinegar, 2 teaspoons sugar, 1/2 teaspoon hot sauce, and salt and pepper to taste and heat through, 2 to 3 more minutes. Stir in 3 chopped scallions.
Photograph by David Malosh
Recipe courtesy of Food Network Magazine