Ground beef tostadas are a quick and easy recipe to make for a nice family dinner. This recipe calls for a meat-based filling that you can make ahead of time and freeze. To thaw, just let the meat stand in the fridge overnight and then reheat in a saucepan. Tostadas are a crisp flour tortilla topped with a seasoned meat mixture, then just about every topping you can think of. Classic toppings include chopped fresh vegetables, sour cream, shredded cheese, guacamole, and salsa. Making tostadas for dinner provides a nice alternative to tacos, which can become a weekly standby in some households. It's the same flavors and types of ingredients, but in a new format, which may appeal to finicky kids.