Preheat oven to 350°. Line a large rimmed baking sheet with foil.
On prepared pan, toss together bread pieces, melted butter, and ¼ teaspoon each salt and pepper; arrange in a single layer.
Bake until golden brown, about 15 minutes. Let cool.
In a large bowl, whisk together olive oil, vinegar, mustard, and remaining ½ teaspoon each salt and pepper. Stir in bread, tomatoes, and all remaining ingredients until well combined. Serve immediately.
Notes
Kitchen Tip: Dress this salad up for company by serving it in a bread bowl.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/caprese-panzanella-salad-recipe/