Tostadas are pre-fried corn tortillas and are a common and delicious way to enjoy stale tortillas. They are delicious and considered by many as the mother of all tortilla chips! think of them as crispy pizzas or a giant nacho. These was here are pre-cooked, so all you have to do is put them in a baking tray and finish them off in the oven at 180 degrees celsius for 3 minutes until they become warm and crispy. They can be then eaten warm or cold. We love them as a quick alternative to the make your own version on the blog.