Pour one tablespoon of olive oil in a pan and toast bread until
it has browned. Transfer the bread to a shallow salad plate.
Pour another tablespoon of olive oil and add zucchini slices
to the pan. Cook 2 minutes on each side. Remove from heat, and transfer grilled zucchini
to the salad plate.
Now add tomatoes, basil and mozzarella to the salad dish.
In a small ramekin mix the remaining olive oil with salt and
pepper and oregano and pour over the mixture.
Drizzle with balsamic vinegar and serve immediately.