Ingredients:

• 2 pounds fresh, deboned red snapper (or other firm-fleshed fish) fillets, cut into 1/2-inch pieces
• 1/2 cup freshly squeezed lime juice
• 1/2 cup freshly squeezed lemon juice
• 1/2 red onion, finely diced
• 1 cup chopped seeded fresh tomatoes
• 1 serrano chili, seeded and finely diced
• 2 teaspoons kosher salt
• Pinch ground oregano
• Dash Tabasco or a light pinch of cayenne pepper
• To serve:
• Cilantro
• Avocado
• Tortillas or tortilla chips