Ate so many shrimp tostadas like these on the coast of the Sea of Cortez, along the shores of the states of Sinaloa and Sonora. Very norteño food. Just like people dont think about seafood when they think about northern Mexico, I had no idea this was how they ate their tostadas.
The tostadas, rather than refried beans go slathered with mayo and then the quickly seared or many times fresh and raw seafood, and salsas galore. Can pile up as high as you want.