Tostadas de Pollo Tostadas are crunchy tortillas like hard taco shells but flat. Tostadas also refers to a prepared dish in which the crunchy tostadas are topped with refried beans, shredded chicken, shredded iceberg lettuce, thinly sliced white onion, Mexican cream, crumbly cheese and your favorite salsa. We prepared these with our homemade salsa roja.