At my daughter’s high school the lunch service is amazing. (Closer to what @zenvelo mentions.) It’s way better than even my college’s dorm food service was back in the day.
They have a “quick” line where you can get pop, chips or snack foods, a regular hot food cafeteria line where kids/staff can select from multiple meal options (e.g. pizza, grilled cheese sandwiches, whatever the cooked entree of the day is..and a salad bar is always available, too) and then a separate area off to the side where you can always get a sub sandwich (like a mini-Subway sub shop set up to the side) made to order. They also have a multitude of drink and dessert options off to the side, too.
The only complaint our daughter has is that her lunch period is so short (I think it’s only 15 or 18 minutes?) she doesn’t like to go through the lunch line & prefers to pack a lunch from home so she can have more time to socialize with her friends.