Step 1

Preheat the oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper or a silicone baking mat.

Step 2

Place bread cubes on the prepared baking sheet.

Step 3

Toast bread in the preheated oven until browned and fully crisp, about 20 minutes. Remove from the oven and let cool down to room temperature.

Step 4

Mash garlic, sugar, and anchovy into a coarse paste using the back of a fork. Add vinegar and oil; whisk until combined.

Step 5

Toss vine-ripened tomatoes, cherry tomatoes, salt, and pepper into the dressing with a spatula. Let sit for 10 minutes.

Step 6

Add mozzarella and red onion to the tomato mixture and toss with a spatula to combine. Add bread cubes and mix until saturated as desired. Mix in basil. Taste for seasoning before serving.