Preheat your oven to 350 degrees F (175 degrees C). Take a baking pan and line it with parchment paper.
Cut the baguette into 1-inch (2.5 cm) pieces, and spread them out on the baking pan. Make sure that the pieces are evenly spaced out.
Bake the bread for about 10 minutes, or until golden brown. Remove from oven and let cool.
Meanwhile, prepare the dressing by whisking together all of the ingredients in a bowl. Set aside.
In a large salad bowl, combine the cooled bread pieces, tomatoes, cucumber, onion, garlic, olives, and basil leaves.
Pour the dressing over the salad and mix everything together gently with your hands or a spoon. Let sit for about 15 minutes so that the bread can absorb some of the dressing flavors.
7 . Serve the summer panzanella salad at room temperature. Enjoy!