Junior year of college I studied in Italy for a semester. It was one of my most memorable experiences. It was definitely the most memorable food experience. I ate 24/7. It's Italy, that is what you should do, right? Everything tasted so amazing.
One thing I ate pretty much every day was a toasted tomato, mozzarella, and pesto sandwich. So good, lots of carbs though. Which is why it should have occurred to me that despite walking everywhere, I was gaining weight.
I still like to make this sandwich at home but prefer to make it crostini style. I think it tastes better and keeps the carbs down.
ciabatta or Italian bread
Slice the bread as thin as possible, about 1 centimeter thick. Layer on pesto, sliced tomatoes, and shredded mozzarella. Sprinkle with salt&pepper.
Place crostini on a baking sheet lined with parchment paper and toast in the oven until cheese is melted and bread is crispy. This takes about 10 minutes on 400.