How to Make It
In a glass bowl, combine the onion, tomatoes, olives, jalapeños and crabmeat. Add the lime juice and olive oil and season with salt and pepper. Marinate the seafood cocktail in the refrigerator for at least 45 minutes.
Combine the water and salt and use a pastry brush to dampen the surface of the tortillas. Preheat a comal or griddle and toast the tortillas on both sides, until crisp. (Another option is to cut the tortillas into wedges and fry them).
Spoon the seafood cocktail into individual tequila shot glasses and arrange on a serving platter or a serving board. Drizzle a little extra-virgin olive oil over each shot glass cocktail and serve the tortillas on the side.