I interviewed a collection of students from the two high schools where I work in Grado. Because many of their answers were similar or the same, I combined them into a collective answer to share with you.
For breakfast, students often eat a sandwich of ham and cheese with a glass of Colacao (Spain's version of Nesquick). Others will have cereal with a glass of Colacao. For lunch (2:30 or 3:00 p.m.) it depends on the family, as lunch is the biggest meal of the day. Sometimes they can eat salads as an appetizer and then pasta, soup, tortilla de patatas (potato omelet) as the main course. Dinner is very late (10:00 p.m., normally) and so they will eat something light like a small piece of tortilla, soup or a sandwich again before bed.
Most of the students' homes are like the ones in the U.S., if not a little smaller. For those who live in nearby and smaller villages, their homes all have bedrooms, a kitchen, bathrooms and a living room. Some of the students have detached garages, while others don't have one at all. Others live in apartments in the main village of Grado, and so the spaces are a bit smaller than a house and some students share rooms with siblings.