Brush bread with olive oil and toast in a 375 degree oven for 15 minutes or until golden brown.
Rub bread with garlic cloves.
Break bread into cubes and add to bowl. Add in minced garlic.
Cut grape tomatoes from pole to pole. Place in colander that is placed over a bowl. Sprinkle with salt and let tomatoes sweat for 15 tomatoes.
Add the beans, basil, mozzarella balls and tomatoes to the bowl, reserving the tomato liquid.
Combine vinegar, olive oil, djion mustard, and tomato liquid and whisk together. Pour over the bread mixture and toss. Add salt and pepper to taste. Allow flavors to marry for 5-10 minutes before serving.