Ingredients

2 pounds tilapia fillets, finely diced* see Cook’s Note

1 cup lime juice (about 8 large limes)

1/2 cup seeded chopped tomato

1/2 cucumber, peeled, seeded and finely diced

1/2 cup finely chopped onion

1/4 cup chopped fresh cilantro leaves

Salt and freshly ground black pepper

1/2 cup clam-tomato juice (recommended: Clamato), optional

1 tablespoon bottled hot sauce (recommended: Huichol), optional

1 serrano chile, optional

Grilled Tostadas, recipe follows, or 6 purchased tostadas

Mayonnaise, for spreading

1 avocado, halved, pitted, peeled, and thinly sliced

1 lime, cut into wedges

Preparation

Put the tilapia in a medium bowl. Pour the lime juice over the fish and mix gently to combine. Cover with plastic wrap and chill in the refrigerator until the fish is white throughout, about 15 to 20 minutes.

Remove from the refrigerator and drain off the lime juice, gently squeezing the fish with your hands. Discard the lime juice. Add the tomato, cucumber, onion, and cilantro. Season with salt and pepper, to taste. Add the clam-tomato juice and the hot sauce and chile, if using.