Tostadas and tacos share a common denominator in the tortilla, but just how different are these traditional Mexican dishes? Is a tostada just a flat taco? "Yes, kind of, but not really" would be the ...

Start with the shrimp. You can buy it shelled and deveined, or do it yourself. Cut the shrimp into small pieces—about the size of a dime—and set aside 6 whole ones for presentation. Place all the ...