Side question: Why do people buy baguettes? Do they make sandwiches with them? How do you even make a sandwich from them? How are you meant to beat a baguette???

Side question: Why do people buy baguettes? Do they make sandwiches with them? How do you even make a sandwich from them? How are you meant to beat a baguette???

So here in the UK they sell these fresh in Lidl: a cheap supermarket but it has an amazing bakery where they make these and other items.
I often go to Lidl at lunchtime to buy two of these and something simple to fill them with into sandwiches, usually cheese and ham, (insert bland UK food joke here).
My question for you, in the spirit of international culinary collaboration, what Brazilian fillings would you stuff one of these with to make a great sandwich?