Preheat your grill/oven to 450° degrees F.
Place the slices of bread on a baking sheet and drizzle with olive oil on both sides.
Rub each side of bread with the halved garlic clove.
Sprinkle the toast with salt and pepper. and grill the bread for 2-3 minutes.
Place the avocado slices and tomato slices on a plate and drizzle with olive oil. Season with salt and pepper.
Top the sliced mozzarella, tomatoes and avocados on the grilled bread. Top with a little more olive oil.
Sprinkle with more salt and pepper, if required.
Top with basil leaves and balsamic drizzle if preferred.