Preheat oven to 350 degrees F. Tear the baguette into 1" chunks. Toss with 2 tablespoons oil, salt, and pepper. Spread in an even layer on a parchment-lined baking sheet. Bake 10 minutes, stirring twice, until golden and toasted.
Meanwhile, halve cherry tomatoes. Chop cucumber. Finely chop onion and cut watermelon into smaller cubes.
In a large bowl, whisk together remaining 4 tablespoons oil, vinegar, salt, and pepper. Add tomatoes, cucumber, onion, watermelon, and toasted bread cubes. Toss to combine and arrange on a large platter.
Drain mozzarella balls, tear prosciutto into ribbons, and slice basil. To serve, arrange mozzarella, prosciutto, and basil on top of salad.
Hannaford fresh Magazine, July August 2023