Casual food, the Bar, Autogrill etc. will have coffee, and simple sandwiches that are pre-made. They may heat them in a machine like a waffle maker. You will frequently pay first at a cashier and then give the receipt to the food handler who will fill your order. Sandwiches may come from a different person or area than the drinks. The next level up is Pizza.
Pizzas are for one person.
Don t assume anything is included. You may not be ordering the toppings, You are probably ordering the ingredients. You may need to request cheese and tomato sauce. Crusts are thin. The pizza is more like California Pizza Kitchen than Round Table.