The frita is a classic regional American burger created by Cuban immigrants in South Florida. While the standard is a thin, griddled patty with a spiced ketchup-based sauce, my take on it is a slightly larger version designed for the backyard grill with a boldly seasoned pork and beef patty, a creamier sauce, and more vegetables. The crisp shoestring potatoes that are the hallmark of a traditional frita remain the same.