The index sendvič (lit. index sandwich) is a popular, hearty sandwich from Novi Sad, Serbia, particularly loved by students due to its affordability and filling nature. The sandwich is typically made with a large, soft white bread roll (kifla in Serbia) and filled with a combination of savory ingredients.

The classic indeks sandwich usually is filled with layers of ham, cheese, and mushrooms, all topped with sour cream, ketchup, and mayonnaise. The sandwich is then often grilled or baked until the cheese melts, creating a warm, crispy, and gooey treat.

Variations may also include additional ingredients like pickles, different seasonings, types of cheese, and vegetables. But in general, the sandwich is customizable as when ordering, one chooses what he or she would like in the sandwich. It is named "indeks" (index) after the booklet that university students in Serbia use to record their grades, as it was invented as a cheap and filling meal fitting for a student's budget.

It became a symbol of student life in Novi Sad, but these days, it is eaten by everyone, and it's a popular street food.