mexican ceviche recipe

Ingredients 1 lb fresh fish fillets (like tilapia, snapper, or halibut), finely diced 1 cup fresh lime juice (about 8-10 limes) 1 cup fresh lemon juice (about 4-5 lemons) 1 small red onion, finely chopped 2-3 jalapeños, seeded and finely chopped 2 medium tomatoes, diced 1 cup cilantro, chopped 1 cucumber, peeled, seeded, and diced 1 avocado, diced Salt and pepper to taste