Sweetness from fruit and piquancy from mustard give depth of flavor to this Italian condiment. Serve it alongside meat or fish, or with bread and cheese before a meal.
Whisk together wine and mustard in a bowl. Combine peaches, cherries, sugar, orange zest and juice, and salt in a large saucepan over medium heat. Stir in wine-mustard mixture. Simmer for 20 minutes. Let cool. Refrigerate until ready to use (up to 3 days).