Essentially, it is a hot and spicy sausage that is served with eggs for breakfast, as a filling for tostados or tacos, or mixed with refried beans. (fieryfoodscentral.com)
Instead of toast I used a tortilla making an avocado tostado of sorts. (californiaavocado.com)
Just wanted to add that I put corn tortillas in the oven until hard - perfect inexpensive tostado shells! (myrecipes.com)