Preheat oven to 350 degrees. Spread bread cubes onto a baking sheet and toast in oven for 5-7 minutes until crunchy.
Place bread cubes, diced tomato, cooked shrimp, mozzarella, and basil in a large bowl.
Whisk olive oil, vinegar and garlic together then drizzle over salad. Only use a couple of tablespoons to begin, then add as needed. Season with salt & pepper.
Allow salad to sit for 15 minutes so the flavors will blend.