The document discusses three types of restaurants - souvlaki, pizzeria, and fast food - and their use of frozen and local ingredients. Souvlaki and pizzeria use some frozen ingredients like chicken and chips but also use mainly local herbs. Fast food prefers ready-made packages to prepare meals quickly over using local or fresh ingredients. Overall, frozen products are used more commonly in fast food restaurants compared to souvlaki and pizzeria which aim to offer higher quality meals using local ingredients.