½ a red onion, thinly sliced, with the grain.
1- 1 ½ teaspoon kosher salt, start with 1, add more to taste
¼ teaspoon black pepper
¾ cup fresh lime juice (4-6 limes) freshly squeezed ( try to use ripe limes)
1-2 garlic cloves very finely minced (use a garlic press)
1 fresh serrano or jalapeño chili pepper seeded and very finely chopped. Start conservatively, more to taste.
1 pound fresh fish- sea bass, red snapper, corvina, halibut, dorado, escolar, mahi-mahi, tilapia, or hamachi – diced into 1/2 inch cubes.
¼-½ cup fresh cilantro, chopped
1 cup grape or cherry tomatoes, sliced or cut in half (or 1 cup diced tomatoes)
1 cup diced cucumber
1 tablespoon olive oil (optional)
optional: 1 semi-firm Avocado, diced, or make the Avocado Sauce
⅔ cup Avocado
⅓ cup cilantro
2/3 cup water- plus more as needed
1 tablespoon olive oil
½ teaspoon kosher salt
1 teaspoon coriander
2 tablespoons lime juice
1 garlic clove
cracked pepper to taste