Panzanella Toscana with Grilled Chicken - Authentic Tuscan Bread Salad

Ingredients

• 2 cups cooked grilled chicken breast, sliced
• 4 cups day-old crusty bread (like ciabatta), cut into 1-inch cubes
• 2 cups cherry tomatoes, halved
• 1 cup cucumber, sliced
• 1/2 red onion, thinly sliced
• 1/2 cup fresh basil leaves, torn
• 1/4 cup chopped parsley (optional)
• Salt
• pepper
• 1/4 cup extra-virgin olive oil
• 2 tablespoons balsamic vinegar
• 1 teaspoon Dijon mustard
• 1 garlic clove, minced